Pelvic fin
Videos
Pelvic fins or ventral fins are paired fins located on the ventral surface of fish, and are the lower of the only two sets of paired fins. The pelvic fins are homologous to the hindlimbs of tetrapods,
Pelvic fins from a Java barb (Barbonymus gonionotus)
Gobiids have modified their pelvic fins into adhesive suckers.
Lumpsuckers use their modified pelvic fins to adhere to the substrate.
The pelvic fin appears at roughly 21 days post fertilization in zebrafish
Fish fin
Videos
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and lift, which help the fish swim. Apart from the tail or caudal fin, fish fins have no direct
Pelvic fin
…Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral…
Skeleton of a lingcod, a ray-finned fish
Lobe-finned fishes, like this coelacanth, have fins that are borne on a fleshy, lobe-like, scaly stalk extending from the body. Due to the high number of fins it possesses, the coelacanth has high manoeuvrability and can orient its body in almost any direction in the water.
Pectoral fin with fleshy lobe of Latimeria chalumnae (Citron / CC-BY-SA-3.0)
Skeleton of the pectoral girdle and fin of the extant coelacanth Latimeria chalumnae (Citron / CC-BY-SA-3.0)