Pelvic fin

/pˈɛlvɪk fˈɪn/

Pelvic fin

a pair of paired fins located on the ventral side of a fish's body which aid in stability, maneuverability, and sometimes reproductive functions

synonyms : ventral fin

What is "pelvic fin"?

The pelvic fin, also known as the ventral fin, is a pair of paired fins found on the underside of a fish's body, specifically in the pelvic region. These fins play a crucial role in the fish's movement and maneuverability, helping to maintain balance and control during swimming. In addition to locomotion, the pelvic fins may also serve reproductive functions, such as assisting in courtship displays or aiding in the transfer of gametes during mating. The shape, size, and structure of the pelvic fins can vary among different fish species, reflecting their adaptations to specific habitats and lifestyles.

Examples

1. It lacks pelvic fins, swim bladders, and scales.

2. One particular species, the little skate, uses unique movements of their small pelvic fins to create a distinct walk when they’re cruising along.

3. It also has unique pectoral and pelvic fins that it uses to walk across the ocean floor.