The warty frogfish or clown frogfish is a species of marine ray-finned fish belonging to the family Antennariidae, the frogfishes. The warty frogfish is found in the Indo-Pacific region.
Antennarius maculatus.003 Aquarium Finisterrae
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