1. Shellfish
First on this list is shellfish and, as the name suggests, it refers to a broad category of aquatic creatures with a shell or shell-like exterior. There are two types of shellfish: crustaceans and mollusks.
Crustaceans have an external skeleton made of chitin, a carbohydrate, and include shrimp, crayfish, crab, and lobster. Meanwhile, mollusks have soft, segmented bodies enclosed in a hard calcium carbonate shell, and include clams, scallops, oysters, and mussels.
All shellfish contain taurine, but mussels, scallops, oysters, and clams are some of the best sources of taurine. It is worth noting that some of the taurine may be lost when shellfish is boiled or basted because the amino acid breaks down.