second dorsal fin – Definition, Pronunciation & Pictures

second dorsal fin /ˈsɜːtʃandɹˈɛskjuː antˈɛnəz/ n

中文：第二背鳍

Meaning：Swimming appendage formed of a membrane and rays located on the middle posterior dorsal portion of the body; it provides stability.

Found in these illustrated scenes（2）

Perch anatomy Cartilaginous fish