Klingon gagh? No, just live river eels on the market (Lang Sơn, Vietnam)
This really looks like Gagh, the famous Klingon delicacy in the StarTrek TV series. Best eaten fresh and alive!
I just noticed that all the eels plunge their head down, so all you see are bodies and tails, no heads! I like the bubbles, too...
Scale: about 60 cm (2 feet) from left to right.