Question

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Answer 1

Refer to this portion of a dichotomous key for fish identification to answer the question.

1. (a) Has a single dorsal fin ® 5
(b) Has a double dorsal fin ® 2
5. (a) Has small fin on back near tail ® 6
(b) Has no fin on back near tail ® 7
6. (a) Has barbs near the mouth ® Catfish
(b) Does not have barbs near the mouth ® 10

According to this dichotomous key, any catfish must have
a double dorsal fin, a small fin on the back near the tail, and barbs near the mouth.
a single dorsal fin, no small fin on the back near the tail, and barbs near the mouth.
a double dorsal fin, a small fin on the back near the tail, and no barbs near the mouth.
a single dorsal fin, a small fin on the back near the tail, and barbs near the mouth.

Answer 2

I can tell you right now a Catfish has:
a double dorsal fin
a small fin on the back near the tail
barbs near the mouth

Take a look at the picture.

As far as your question in concerned, I'm unable to fully comprehend the material you're referring to and would appreciate some further elaboration on your behalf. Thank you.

Answer 3

okay thank you