Handbook for the Identification of Yellowfin and Bigeye Tunas

This is a great document that points out and explains identification features for both Yellowfin and Bigeye Tuna.

When it comes to Yellowfin, the one ID feature that never seems to fail me is to look for the tail bumps. Here is a picture, but read the document is is really good.

Handbook for the Identification of Yellowfin and Bigeye Tunas

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