Which fin was the largest?

The largest fin on a fish is typically the dorsal fin, which is located on the back of the fish. In many species, this fin can vary greatly in size and shape, depending on the species and its adaptations for swimming and stability. For example, the dorsal fin of the whale shark, the largest fish in the ocean, can be significantly larger than those of many other fish species. However, in terms of sheer size, the pectoral fins of some large species like manta rays can also be quite impressive.