What is the largest fish in the world?
AnswerWhale shark
The whale shark is a fish; the blue whale is a mammal.
Animals · Facts & stats
Fin facts & stats
7 fact-checked facts about fins, fish and sea life, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is the fin on a shark's back that often shows above the water?
AnswerDorsal fin
The dorsal fin sits on the back and helps with stability.
Going deeper
What is a fish's tail fin called?
AnswerCaudal fin
The caudal fin usually provides the main thrust.
What are shark skeletons made of?
AnswerCartilage
Sharks and rays are cartilaginous fishes.
Seahorses swim upright mainly using which fin?
AnswerDorsal fin
A seahorse's small dorsal fin beats rapidly to push it along.
Expert level
What is the scientific name of the ray-finned fishes?
AnswerActinopterygii
Ray-finned fishes make up the vast majority of fish species.
The coelacanth, a lobe-finned fish once thought extinct, was rediscovered in 1938 off which country?
AnswerSouth Africa
A coelacanth was caught near East London, South Africa, in 1938.
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