Here are a few provisional recipes for supporting vanilla marine life:

Sea Pickles: Moderate chance of getting Coelenterazine (C2 6 H 21 N 3 O 3) from them (this is a yellow powder IRL)

Tube coral: Small chance of getting Norzoanthamine (C 29 H39 N O 5) from them (this is a molecule that has been shown to increase strength in mice so maybe it will kinda be like a strength pot?)

Fire coral: Small chance of getting Complanine (C 11 H 22 N O Cl) from them

Horn and Bubble coral: Calcium carbonate (these type of corals don't make any cool molecules sadly)