![subject](/tpl/images/cats/biologiya.png)
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
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Refer to this portion of a dichotomous key for fish identification to answer the question.
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