Croaker has few spines, and wild crucian carp mostly lives in ponds and small rivers. Wild crucian carp has many spines. There are many small spines on one big spine, and there are many small spines on the dorsal fin, pelvic fin, and tail fin. Yellow croaker is a marine fish with a big backbone and a large spine, and then a few small spines. Compared with crucian carp, yellow croaker has fewer spines.

croaker

Croaker has few spines, and wild crucian carp mostly lives in ponds and small rivers. Wild crucian carp has many spines. There are many small spines on one big spine. The dorsal fin, pelvic fin, and tail fin all have many small spines. Yellow croaker is a marine fish with a big backbone and a large spine, and then a few small spines. Compared with crucian carp, yellow croaker has fewer spines.