pelvic fin

US /ˈpel.vɪk fɪn/
UK /ˈpel.vɪk fɪn/
"pelvic fin" picture
1.

sirip perut, sirip panggul

either of a pair of fins on the underside of a fish's body, typically behind the pectoral fins, that help control direction and stability

:
The fish used its pelvic fins to maintain balance in the current.
Ikan itu menggunakan sirip perutnya untuk menjaga keseimbangan dalam arus.
Sharks have two pelvic fins located near their cloaca.
Hiu memiliki dua sirip perut yang terletak di dekat kloaka mereka.