Bluerunner or Yellow Jack?


Recently I have started seeing small jacks with yellow fins that are about 5 or 6 inches long. They are either young Bluerunner or Yellow jacks. Bluerunners are very common in this area, but I have never seen adult Yellow jacks here. You can see black tips on the tail or caudal fin, so does that make this a Bluerunner? I am confused because I don't see any reference that says a young Bluerunner has yellow fins. I checked the DVD, but it doesn't even have Bluerunners. The photos above are from two different dive locations I did in the last two weeks. Both dives were in the northern Gulf of Mexico, east of Panama City, FL ~Carol

I say Blue Runners

First , it is on the CD-ROM. Look for Runner, Blue (not Bluerunner). Or under family names, Jacks, then scroll down to Runner. And even better yet... once you find them look at the last pic #6 Yellow tail and all. Although, in the text it doesn't say about young ones having yellow fins.

It doesn't seem to me to fit the shape (head in particular) of a yellow. The eye seems a lot closer to the tip of upper lip than in yellows. there also seems to be a lot less yellow on the top of the body itself.

Yellow jacks

Combined with the clearly yellow fins, the upward curving and sharp downward bending lateral line look like yellow jacks to me.


I agree - yellow jacks. the body shape just isn't right for blue runner. They almost look like young horse eye jack but the eye and tail aren't big enough.

Caranx crysos

Those are definitely Caranx crysos, Blue Runners.


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