Fanfin

Also known as Pelagic Fanfin Angler, Fanfin Anglerfish

Fanfins drift through the pitch-black bathypelagic zone, draped in extraordinarily elongated dorsal and anal fin rays that act as delicate antennae to detect shifts in water displacement. Unlike most deep-sea anglerfish, females lack a glowing bacterial light organ on their illicium, relying instead on mechanical sensory filaments to ambush passing prey. Males are dwarfed by females, using well-developed olfactory organs to locate a mate in the deep ocean before biting into her flesh and fusing permanently into a parasitic sperm-producing partner.