[atomichaggis]

It would be like swimming with a minky whale! Siamese giant carp have creepy eyes tho.

I think most fish have tough mouths. I often catch Cod with crabs still hanging from their lips... they just carry on feeding. You can often find indentations where fishing hooks have been stuck in their mouths and been dissolved.
Carp lips feel similar... minus the really abrasive teeth beyond.