Question: Which out of the following is not a true fish?
A Starfish
B Jellyfish
C Cuttlefish
D All of These
Answer: All of These
| Name | Phylum | General characteristics |
| Crayfish | Arthropoda | · Crayfish is also known as crawfish and are crustaceans belonging to the order Decapoda. |
| Jellyfish | Cnidaria | · Jellyfish belongs to phylum Cnidaria · They have a gelatinous, umbrella-like body having tentacles. |
| Clownfish | Chordata | · They are actually a type of anemonefish which belongs to the order Perciformes. |
| Seahorse | Chordata | · Seahorses have some unique characteristics such as lacking of scales and a unique body shape. |
| Silverfish | Arthropoda | · Silverfish are wingless insects known for their silvery appearance. · These insects feed on starches and cellulose found in paper, books and other materials. |
| Cuttlefish | Mollusca | · Cuttlefish belongs to class Cephalopoda. · They have ability to rapidly change color and texture for camouflage and communication purposes. · They are closely related to squids and octopuses. |
| Dolphin | Chordata | · Dolphins belong to the order Cetacea. · They are highly intelligent marine mammals known for their social behavior, streamlined bodies and dorsal fins |
| Whale | Chordata | · Whales are also marine mammals and are not considered true fish. |