Scubamedicjoe
Contributor
Seajay great picture also while I got you and andrea hear you two going on dive in may look at nc wreck dive board
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SeaJay once bubbled...
Yep, they entice them to approach by wiggling their fingers at them.
With mouths that big, no doubt they could swallow the whole arm!
When I worked at the Aquarium in Charleston and hand-fed the sometimes very large fish there, I learned a bit about feeding habits. They sorta "pop" the food into their mouths with one large, loud "suck." The immense pressure no doubt stuns their prey, and they simply swallow.
Since the catfish can really only swallow your hand or up to your elbow, all you'd have to really do is sorta grab hold of the fish from the inside, even if it had swallowed your arm. No doubt the pressure doesn't feel too good (the idea is to entice them but not get them to actually swallow your arm) but I don't think it'd cause any permanent damage.
Teeth? Sorta... Kinda like a "bony plate" thing, with serrations... Definitely something to be careful of, but I don't think you'd die or anything...
Never had it happen to me (I have more brains that to fish like this), but I don't think that they'd really take a hand off or anything.
Hey, doesn't this one look kinda like a prop out of the '80's "B" movie with Kevin Bacon called Tremors?
http://www.islc.net/~lra/cat3.jpg