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Question

Which of the following is true with respect to Echeneis?

A
The head resembles a hammer.
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B
It is a cartilaginous fish.
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C
Dorsal fin is modified into an adhesive disc.
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D
Spines are present in second dorsal and anal fins.
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Solution

The correct option is C Dorsal fin is modified into an adhesive disc.
The highly modified dorsal fin is an oval-shaped, sucking disc which is the most important characteristic feature of Echeneis. They attach themselves to sharks, turtles, whales and large bony fish in order to get food. They are also called sharksuckers.
489431_149920_ans_487a62794c8d4acba9953def25368fad.jpg

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