The Living WorldMedium
Question
Select the set of fishes which belong to the class Osteichthyes:
Options
A.Devil fish, Cuttlefish and Hagfish
B.Saw fish, fighting fish and Dog fish
C.Starfish, Hagfish and Cuttlefish
D.Flying fish, Angel fish and Fighting fish
Solution
Sol. [Key Concept: Osteichthyes — the bony fishes]
Flying fish (Exocoetus) is a marine bony fish. Angel fish (Pterophyllum) and fighting fish (Betta) are aquarium bony fishes.
Option (1) is incorrect as:-
Devil fish (Octopus) and cuttlefish (Sepia) are molluscs.
Hag fish (Myxine) is a cyclostome.
Option (2) is incorrect as:-
Saw fish (Pristis) and dog fish (Scoliodon) are cartilaginous fishes.
Option (3) is incorrect as:-
Star fish (Asterias) is an echinoderm.
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