Here's an object that probably doesn't deserve to be recovered - the head on the Matt Turecamo.Look at the difference between these two shots; the first in 1997, not long after the sinking, and the second in 2000. Hydroids have replaced mussels, and the floor is covered with a foot of silt."Heads" on the Coney Island (top) and Great Isaac (bottom). Courtesy Perry Arts.Head on the Mandy Ray
Lumped together here are what might be considered to be "normal" aquatic crabs. There are many other similar types. The claws of many crabs are good eating - break one off and let the crab go, it will grow a new one. Never take both - you'll kill it.