The American Eel lives in the far-flung corners of the North Atlantic. It has a snakelike body and can grow up to five feet, though most individuals measure only two to three feet.
Its skin ranges from yellow to green-brown, and it has a lighter belly, camouflaging it in riverbeds and coastal waters.
These types of eels are both freshwater and saltwater eels. They spend most of their lives in freshwater or brackish environments. However, during the breeding season, they migrate to the ocean.
Additionally, these true eels eat various prey, such as insects, crustaceans, and fish. At night, the American eel emerges from the sand to hunt. They also don’t hesitate to step onto land for food.
Username: Ebook Published on 2024-12-16 10:29:11 ID NUMBER: 127220
The American Eel lives in the far-flung corners of the North Atlantic. It has a snakelike body and can grow up to five feet, though most individuals measure only two to three feet.
Its skin ranges from yellow to green-brown, and it has a lighter belly, camouflaging it in riverbeds and coastal waters.
These types of eels are both freshwater and saltwater eels. They spend most of their lives in freshwater or brackish environments. However, during the breeding season, they migrate to the ocean.
Additionally, these true eels eat various prey, such as insects, crustaceans, and fish. At night, the American eel emerges from the sand to hunt. They also don’t hesitate to step onto land for food.
The European Eel can grow up to 5 feet long and camouflage itself in its environment. Moreover, they are nocturnal hunters that feed on insects, crustaceans, mollusks, and other small aquatic animals.
Additionally, European Eels are catadromous; they spend most of their lives in freshwater or brackish waters and travel to the Sargasso Sea to breed1.
They turn from larvae to glass eels during their journey, then to yellow and silver eels. These types of eels can also breathe through their skin, enabling them to survive short periods of drought.
The Japanese Eel lives off the coast of Japan, Korea, Vietnam, and the northern regions of the South China Sea. They are olive green, tranquil brown, white, or soft yellow. Moreover, they have small heads with large eyes that help them see in the dark.
The Japanese Eel migrates most of its time in freshwater or brackish waters. During the breeding season, they migrate into the ocean, swimming hundreds, or even thousands, of miles to reach spawning grounds in the far West of the North Pacific Ocean.
Part of the eel life cycle is the development of leptocephali, offspring that rely on ocean currents to guide them back to their freshwater habitats for several months3.
The mottled eel (Anguilla bengalensis), also known as the African mottled eel, the Indian longfin eel, the Indian mottled eel, the long-finned eel or the river eel is a demersal, catadromous eel in the family Anguillidae. It was described by John McClelland in 1844. It is a tropical, freshwater eel which is known from East Africa, Bangladesh, Andaman Islands, Mozambique, Malawi, Sri Lanka, Sumatra, and Indonesia and recently from Madagascar. The eels spend most of their lives in freshwater at a depth range of 3–10 metres, but migrate to the Indian Ocean to breed. Males can reach a maximum total length of 121 centimetres and a maximum weight of 7,000 grams. The eels feed primarily off of benthic crustaceans, mollusks, finfish and worms.
The Indonesian Shortfin Eel is a deep-brown to light-yellow eel that inhabits the Indian Ocean, Western Pacific Ocean, and Indonesian waters. It is a unique subspecies of the Shortfin Eel, characterized by its shorter dorsal fin beyond the pectoral fins. This catadromous eel lives in freshwater rivers and streams.
During the breeding season, these eels swim against the current and return to the ocean. Moreover, the Indonesian Shortfin Eel embarks on land excursions, using its slender body and sharp pectoral fins to explore new territories. They undertake these journeys at night when they emerge from their burrows and crevices.
Scanning their surroundings for prey, they mainly feed on small fish, crustaceans, and other invertebrates.
The African longfin eel[3] (Anguilla mossambica), also known simply as the longfin eel, is an eel in the family Anguillidae.[4] It was described by Wilhelm Peters in 1852, originally under the genus Muraena.[5] It is a tropical eel known from freshwaters in southern Kenya, Cape Agulhas, Madagascar, and New Caledonia. The eels spend most of their lives in freshwaters far inland, but migrate to the Western Indian Ocean to breed. Males can reach a maximum total length of 150 centimetres; females can reach a maximum standard length of 120 centimetres and a maximum weight of 5,000 grams. The eels can live for about 20 years.[4] Juveniles and adults are known to feed off of carcasses, crabs, and bony fish.[6]
The Zebra Moray Eel has a body pattern of alternating black and white stripes. It commonly lives in the coral reefs of the Indo-Pacific region, including the Red Sea, Hawaii, and the eastern coast of Africa. The eel's teeth are shaped like molars, crushing crustaceans such as shrimp, crabs, and mollusks before eating them.
Despite its unique appearance and eating habits, this type of eel is peaceful. When approached by divers or snorkelers, it retreats to rocky shelters.
The freshwater habitats of New Zealand are home to the New Zealand Longfin Eel. These eels can grow up to 6.6 feet long, with females reaching this maximum size. Hence, the New Zealand Longfin Eel is one of the world’s largest eel species.
These eels are olive green to brown. Their long dorsal fins are notable features; they undulate gracefully, helping them move quietly during nocturnal hunts. Despite their size, they are shy creatures.
During the day, they hide in shadowy locations, such as submerged logs or unseen crevices. Their keen sense of smell helps them find prey, primarily invertebrates, small mammals, and other fish.
Moreover, these eels can live for over a century but only breed once. During the breeding season, they embark on an epic journey from their freshwater homes to their spawning grounds in the deep Pacific Ocean near Tonga. After mating, the eels die. Then, thousands of minute larvae return to New Zealand, guided by the waves.
The speckled longfin eel, Australian long-finned eel or marbled eel (Anguilla reinhardtii) is one of 15 species of eel in the family Anguillidae. It has a long snake-like cylindrical body with its dorsal, tail and anal fins joined to form one long fin. The dorsal fin also often extends farther than the anal fin. It usually has a brownish green or olive green back and sides with small darker spots or blotches all over its body. Its underside is paler.[2] It has a small gill opening on each side of its wide head, with thick lips. It is Australia's largest freshwater eel, and the female usually grows much larger than the male.[2][3] It is also known as the spotted eel.
The Southern Shortfin Eel typically inhabits cooler freshwater areas in Australia, New Zealand, and Tasmania. This species is dark brown and olive green, with a lighter underbelly and a shorter dorsal fin. Due to their snake-like locomotion, they can briefly go on land.
The Southern Shortfin Eel also starts life in the deep Coral Sea, turning from larvae into transparent glass eels. Braving numerous challenges, these eels journey from their birthplace to freshwater habitats. Female eels are larger than males, growing up to 3.3 feet long.
These types of eels prefer to stay hidden during the day under rocks and vegetation. They are active at night, feeding on fish, crustaceans, insects, and worms.
The purple spaghetti-eel[2] (Moringua raitaborua) is an eel in the family Moringuidae (spaghetti/worm eels).[3] It was described by Francis Buchanan-Hamilton in 1822, originally under the genus Muraena.[4] It is a tropical eel known from India, Bangladesh, Nepal, Indonesia, and the Philippines. It inhabits rivers and estuaries (including ones in West Bengal, linked to the Ganges River), and has adapted to rapid and wide changes in salinity, pH, and osmoregulatory and hypoxic conditions.[5] Males can reach a maximum standard length of 44 cm.
Snake eels or worm eels look like snakes with long bodies and a scaled texture. They range in color from brown to bright hues and often have patterns serving as camouflage. They live in marine, brackish, and sometimes freshwater environments and spend most of the day burrowed in sand or mud.
This type of eel has a forward escape technique—they disappear by moving forward, not backward, into the sand. Additionally, their hard, pointed tails are uniquely adapted for burrowing. These traits showcase the fascinating adaptability of life underwater.
Pike conger eels can live in fresh and saltwater environments, although they typically prefer saltwater. These eels can grow from two to eight feet long and survive depths of up to 2624.67 ft.
Approximately fifteen different species of pike conger eels live around the world.
Sawtooth eels are pelagic fish living in the dark depths of the ocean. Their name comes from their inward-facing saw-like teeth. This type of eel comprises around eleven species; most sawtooth eels have a maximum size of 24 to 28 in.
Growing up to 5 feet, this long, slender eel moves quickly through the rocky reef environment. The Mediterranean Moray Eel ranges from dark brown to soft grey, with a yellowish underbelly. It doesn't have pectoral fins.
This eel feeds on fish, squids, and octopuses. However, it's far from the top of the food chain as larger fish and marine mammals like seals and sea lions also prey on them.
Moreover, the Mediterranean Moray Eel forces water over its gills to breathe, requiring it to open and close its mouth rhythmically.
The Giant Moray Eel lives in the Indo-Pacific region's rocky seafloors and coral reefs. It is the world's largest moray eel, measuring 10 feet and weighing over 66 pounds. (The Slender Giant Moray Eel is longer.) Its brown skin has a unique dark spot pattern contrasting with the colorful reefs.
Moreover, this nocturnal eel hides in crevices and caves to avoid predators and rest for its nighttime hunts for fish, cephalopods, and crustaceans.
The Giant Moray Eel also forms alliances with coral groupers to hunt prey. It chases prey into open waters while the grouper takes advantage.
The California Moray Eel lives in the moonlit kelp forests of the eastern Pacific. Their color palette ranges from bronze to olive green and can grow up to 60 in long, although most average around 24 in. Despite their size, they are shy and spend their days hidden in rocky alcoves, away from other marine life.
At nightfall, the California Moray Eel becomes active and relies on its sense of smell to locate small fish or various invertebrates. It creates a cloud of slime to trap and paralyze its victim against the reef or kelp.
Additionally, the eel starts life as a female and becomes a male as it matures through a phenomenon called protogyny.
The California Moray is a primarily solitary species that mainly interacts with others during mating.
The Longfin African conger lives in the Indo-Pacific oceans, from the Red Sea and East Africa to the Marquesas and Easter Islands. They can survive depths of 262 feet, growing up to 4.3 feet long.
This type of eel feeds on small fish and crustaceans. It has an elongated body and fin extending from just behind the head to the tip of the tail, earning it the name 'Longfin.'
The Snowflake Moray Eel has a distinctive pattern of black splotches resembling snowflakes. It is a relatively small eel, typically up to 24 inches long. They live in the tropical Indo-Pacific region, among coral reefs and rock formations in warm summer waters.
The nocturnal Snowflake Moray Eel spends the day in reef crevices to avoid the sun. It is skilled enough to navigate its underwater labyrinth and hunt for food at night. Moreover, its long, flexible body allows it to probe into narrow corners and crevices, looking for small fish and crustaceans.
The Snowflake Moray Eel is peaceful when not on the hunt, attracting aquarium owners worldwide.
The Green Moray Eel inhabits the deep, shadowy waters of the western Atlantic Ocean. Green Moray Eels can grow up to 7.2 feet long and weigh approximately 64 lbs.
Despite its name, this species is not green, but its natural color is soft brown with a layer of yellow mucus. When hit by light, this mucus gives the appearance of vibrant green.
These types of eels periodically open and close their mouths because their gills require a continuous flow of water for breathing. They eat mainly fish, squids, and crabs. Lastly, they hide in dark crevices of coral reefs or rocky underwater terrains during the day and come out at night to hunt.
The American Eel lives in the far-flung corners of the North Atlantic. It has a snakelike body and can grow up to five feet, though most individuals measure only two to three feet.
Its skin ranges from yellow to green-brown, and it has a lighter belly, camouflaging it in riverbeds and coastal waters.
These types of eels are both freshwater and saltwater eels. They spend most of their lives in freshwater or brackish environments. However, during the breeding season, they migrate to the ocean.
Additionally, these true eels eat various prey, such as insects, crustaceans, and fish. At night, the American eel emerges from the sand to hunt. They also don’t hesitate to step onto land for food.
North America is a continent[b] in the Northern and Western Hemispheres.[c] North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean. The region includes the Bahamas, Bermuda, Canada, the Caribbean, Central America, Clipperton Island, Greenland, Mexico, Saint Pierre and Miquelon, the Turks and Caicos Islands, and the United States.
North America
# Country Population
(2024) Land Area
(Km²) Density
(P/Km²)
1 U.S.A. 345,426,571 9,147,420 38
2 Mexico 130,861,007 1,943,950 67
3 Canada 39,742,430 9,093,510 4
4 Guatemala 18,406,359 107,160 172
5 Haiti 11,772,557 27,560 427
6 Dominican Republic 11,427,557 48,320 236
7 Cuba 10,979,783 106,440 103
8 Honduras 10,825,703 111,890 97
9 Nicaragua 6,916,140 120,340 57
10 El Salvador 6,338,193 20,720 306
11 Costa Rica 5,129,910 51,060 100
12 Panama 4,515,577 74,340 61
13 Puerto Rico 3,242,204 8,870 366
14 Jamaica 2,839,175 10,830 262
15 Trinidad and Tobago 1,507,782 5,130 294
16 Belize 417,072 22,810 18
17 Bahamas 401,283 10,010 40
18 Guadeloupe 375,106 1,690 222
19 Martinique 343,195 1,060 324
20 Barbados 282,467 430 657
21 Curaçao 185,482 444 418
22 Saint Lucia 179,744 610 295
23 Grenada 117,207 340 345
24 Aruba 108,066 180 600
25 Saint Vincent and the Grenadines 100,616 390 258
26 Antigua and Barbuda 93,772 440 213
27 United States Virgin Islands 84,905 350 243
28 Cayman Islands 74,457 240 310
29 Dominica 66,205 750 88
30 Bermuda 64,636 50 1,293
31 Greenland 55,840 410,450 0
32 Saint Kitts and Nevis 46,843 260 180
33 Turks and Caicos Islands 46,535 950 49
34 Sint Maarten 43,350 34 1,275
35 British Virgin Islands 39,471 150 263
36 Caribbean Netherlands 30,675 328 94
37 Saint Martin 26,129 53 493
38 Anguilla 14,598 90 162
39 Saint Barthélemy 11,258 21 536
40 Saint Pierre and Miquelon 5,628 230 24
41 Montserrat 4,389 100 44
South America is a continent[g] entirely in the Western Hemisphere[h] and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern subregion of the Americas.
South America
# Country Population
(2024) Land Area
(Km²) Density
(P/Km²)
1 Brazil 211,998,573 8,358,140 25
2 Colombia 52,886,363 1,109,500 48
3 Argentina 45,696,159 2,736,690 17
4 Peru 34,217,848 1,280,000 27
5 Venezuela 28,405,543 882,050 32
6 Chile 19,764,771 743,532 27
7 Ecuador 18,135,478 248,360 73
8 Bolivia 12,413,315 1,083,300 11
9 Paraguay 6,929,153 397,300 17
10 Uruguay 3,386,588 175,020 19
11 Guyana 831,087 196,850 4
12 Suriname 634,431 156,000 4
13 French Guiana 308,522 82,200 4
14 Falkland Islands 3,470 12,170 0
Acronicta americana, the American dagger moth, is a moth of the family Noctuidae. It was originally described by Thaddeus William Harris in 1841 and is native to North America.
The North American Porcupine, or Canadian Porcupine, is the largest porcupine species in North America. It is distributed across various habitats and can reach three feet with tails up to a foot long.
It has around 30,000 barbed, hollow quills embedded into its skin or hair and can easily detach from the porcupine's body. Additionally, North American Porcupines feed on various vegetation, making it a nuisance to foresters. Predators like the North American golden eagles also hunt them.
One peculiar habit of the porcupine is self-anointing, which involves creating a paste and meticulously applying it to its quills. Scientists still do not know the reason behind this behavior.
The American Eel lives in the far-flung corners of the North Atlantic. It has a snakelike body and can grow up to five feet, though most individuals measure only two to three feet.
Its skin ranges from yellow to green-brown, and it has a lighter belly, camouflaging it in riverbeds and coastal waters.
These types of eels are both freshwater and saltwater eels. They spend most of their lives in freshwater or brackish environments. However, during the breeding season, they migrate to the ocean.
Additionally, these true eels eat various prey, such as insects, crustaceans, and fish. At night, the American eel emerges from the sand to hunt. They also don’t hesitate to step onto land for food.
American Crows are approximately 16-21 inches long, showcasing an iridescent, uniform black color. These daring birds in North America adapt comfortably to open habitats, flourishing in farmlands, forests, and cities.
Their diets are notably diverse, scavenging on grains, fruits, insects, small animals, carrion, and human food waste. Scientists have also observed them modifying wood and using it to probe a small hole where a spider lives.
Regarding parenting, the Corvidae family is practicing cooperative breeding. In the 1980s, Lawrence Kilham first observed adult and yearling American Crows take turns in parenting. Young crows can stay with their parents for five years or longer1.
Moreover, the West Nile Virus has impacted their numbers by 45% since 1999. Fortunately, thanks to their resilience, they are still a species of least concern.
The American crocodile reaches a hearty 13.5 feet in length, sporting broad snouts studded with sharp teeth for grappling prey.
They are the only crocodile species native to the US, primarily seen in southern Florida and at times sighted in Louisiana and Texas. Their olive-gray hue provides excellent camouflage in their surroundings, hiding them from prey until the ideal strike moment.
Because of their adaptability, these crocs are the most widespread of all species living in America. They can survive in fresh wetlands, coastal lagoons, and river estuaries and even handle saltwater, courtesy of special glands that filter out excess salt. Other types of crocodiles may have tolerance to salt. Still, only the American crocodile4, other than Saltwater Crocodiles, can thrive in saltwater environments.
Despite their formidable presence and efficient predation, they tend to be reserved and mainly avoid humans. Males are territorial, and despite their solitary life, they contribute significantly to the ecosystem by keeping prey populations in check.
The South American Rattlesnake, also called Tropical Rattlesnake, presents a mix of tans and browns, beautifully designed with diamond-shaped markings along its back. Averaging between 4 and 5 feet, it sports longitudinal rows of keeled scales, lending to its rugged surface texture.
Naturally occupying a broad range of habitats, it is typically found in forests, grasslands, and deserts across South America. This species is active the most during the early morning and dusk. Its diet primarily consists of small mammals, but it also preys on lizards in other areas.
The American Red Squirrel is a small, active rodent in North America's coniferous forests. Their fur is reddish and can range from a soft rusty red to a deep chestnut brown.
They are most active during the early morning and late afternoon, searching for food or guarding their territory.
Likewise, they eat coniferous tree seeds, mushrooms, fruits, and berries, and sometimes even bird eggs or young birds.
They observe "larder hoarding" to store food in a central cache for the winter months, showcasing their industrious nature.
The North American River Otter can survive in various habitats ranging from the icy rivers of Alaska to the humid marshlands of Florida.
These mustelids have a streamlined body, weighing 25 pounds and standing up to 3.5 feet. They also have a broad, flattened head and thick fur, insulating them against the cold of their watery habitats.
These otters have a varied diet, with fish being their main staple. In addition to fish, they also eat amphibians, crustaceans, small mammals, and birds.
Interestingly, North American River Otters perform a poop dance and use designated "latrine sites" for their waste deposits.
