How is the edge of the tail fin described for Merlangius merlangus?
Answer
Straight and non-forked
The structure of the caudal fin, or tail fin, offers another distinct morphological trait for identifying *Merlangius merlangus*. The text specifies that this species possesses a tail fin whose edge is characterized as being straight and entirely non-forked. This contrasts with the caudal fins of some other fish species which may exhibit significant V-shapes or deep forks. This straight edge is part of the overall physical profile that includes having three separated dorsal fins, with the final dorsal fin extending close to this straight tail terminus.
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