English: Swimming zebra shark in Aqua park shinagawa

The zebra bullhead shark (Heterodontus zebra) is a bullhead shark of the family  Heterodontidae found in the central Indo-Pacific between latitudes 40°N and 20°S, from Japan and Korea to Australia.[1][2] It is typically found at relatively shallow depths down to 50 m (160 ft), but off Western Australia, it occurs between 150 and 200 m (490 and 660 ft).[1] It can reach a length of 1.25 m (4.1 ft).[2] The reproduction of this bullhead shark is oviparous.[2]

English: Zebra shark (Stegostoma fasciatum) baby is born at The National SEA LIFE Centre and filmed for an exclusive documentary with the BBC.

Naja is a genus of venomous elapid snakes  commonly known as cobras (or "true cobras"). Various species occur throughout Africa, Southwest Asia, South Asia, and Southeast Asia. Several other elapid species are often called "cobras", such as the king cobra and the rinkhals, but they are not "true cobras", in that they do not belong to the genus Naja.[1][2][3]

The black-necked spitting cobra (Naja nigricollis) is a species of spitting cobra found mostly in sub-Saharan Africa. They are moderately sized snakes that can grow to a length of 1.2 to 2.2 m (3.9 to 7.2 ft) in length. Their coloration and markings can vary considerably. They prey primarily on small rodents. They possess medically significant venom, although the mortality rate for untreated bites on humans is relatively low (~ 5–10%, in endemic regions under 1%). Like other spitting cobras, they can eject venom from their fangs when threatened (one drop over 7 metres (23 ft) and more in perfect accuracy). The cytotoxic venom irritates the skin, causing blisters and inflammation, and can cause permanent blindness if the venom makes contact with the eyes and is not washed off.

The rinkhals (/ˈrɪŋk(h)æls/; Hemachatus haemachatus), also known as the ringhals /ˈrɪŋhæls/[4] or ring-necked spitting cobra,[5] is a species of venomous snake in the family Elapidae. The species is found in parts of southern Africa.[1][3] It is not a true cobra in that it does not belong to the genus Naja, but instead belongs to the monotypic genus Hemachatus. While rinkhals bear a great resemblance to true cobras, they also possess some remarkable differences from these, resulting in their placement outside the genus Naja.[6] In 2023, the Zimbabwe population was described as a new species, H. nyangensis.[7]

Deutsch: Ein Weibchen des Zebrabärbling, Danio rerio
English: A female zebrafish, Danio rerio
Français : Poisson zèbre, Danio rerio
Norsk bokmål: Hunn av sebrafisk, Danio rerio
Svenska: Hona av sebrafisk, Danio rerio

The glowlight danio (Danio choprae) is a small, schooling fish closely related to the popular zebrafish Danio rerio. This should not be confused with the GloFish, a trademarked brand of fluorescent zebrafish that appear to glow in the dark under ultraviolet light.

Zebrafish are used in research at Oregon State University. (Photo by Lynn Ketchum, courtesy of Oregon State University)

The giant danio (Devario aequipinnatus) is a species of freshwater ray-finned fish in the family Danionidae, native to parts of South and Southeast Asia. With a maximum length of about 15 cm (5.9 in), it is one of the largest species in the family. It may be found in the aquarium trade.