Eklipso:
I went out two days ago off the coast of Block Island for a 95 ft wreck dive.
Was it the Idene by any chance? I had a great dive there a couple of years ago, and have been meaning to get back to her. Maybe I'll work it in this summer when I'm down that way for U853 and the Bass.
Eklipso:
I'm not great at identifying sharks, but it was enormous....I couldn't even see its whole body. Normally I don't get nervous around reefs because white tips etc. don't attack people during the day.
Anyone else see something like this? What do you do?
Well, it's certainly possible that it was a great white, but I tend to doubt it if only because of all the possibilities in these waters, that would be low on the probability list. As they are large, have white ventral coloration, and a "lukewarm" blooded circulation system that makes them well adapted to a variety of temperatures (they're found in every ocean of the world) I wouldn't rule it out.
Since a 13 foot 1,221 pound shortfin mako was caught in the vacinity several years ago, and since they're also a mackrel shark like the whites (and therefore have a similar coloration), that's also a possibility. They don't like cold water much, but they have a close relative called a poorbeagle (or "fako") that loves the cold. Since it's been an unusually cold winter here, I can imagine one might extend it's range farther south than usual.
A sand tiger is probably the best guess, as they get pretty big, hang out near wrecks, have a light belly, and are found in the area, although I believe Block Island is near the northern extreme of their range, especially given the temps.
Basking sharks are big and local, but they don't have white bellies as far as I know. Since they're filter feeders and plankton counts tend to drop in cold water, I'd say we can probably rule that one out.
As for tiger sharks, they aren't known to inhabit this area, but a kid surf-casting off Nantucket caught a juvinile tiger a couple of years ago, so I guess it's not impossible.
Personally, my experience with shark encounters in New England is limited spiny dogfish and fishing catches... I consider you very lucky to have seen a shark that size up here!