Which one of the following is a true fish as per the biological system of classification?
A
Silverfish
B
Jellyfish
C
Cuttlefish
D
Flying fish
Correct Answer: Flying fish
Cuttlefish or cuttles are marine animals of the order Sepiida. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone. Despite their name, cuttlefish are not fish but molluscs.
Jellyfish are soft bodied, free-swimming aquatic animals with a gelatinous umbrella-shaped bell and trailing tentacles.