Bait Ball

"In the mouth of a 20' wide alcove south of the altar basin stands an idol or statue of serpentine stone, expertly sculpted to depict a writhing, amorphous agglomeration of fish, eels, octopi, and other marine monsters. This horrid thing is about eight feet high and nearly as broad, the whole forming a globular mass standing about four feet from the altar basin." - Temple of Elemental Evil

Translating from the original High Gygaxian, serpentine is a semi-translucent green stone.  It sort of looks like jade, but is available in much larger quantities.  Gygax being Gygax, the inanimate object is going to try to eat you.

Theodore, Bugbear with Big Stick, posing for scale.

I snuck in a nightcrawler just because.

This one's FIMO soft, a polymer clay made by Staedtler.  The base is Magic Sculpt so that I had somewhere to grip it before baking.  Magic Sculpt has no objection to the temperatures needed to harden polymer clay.