Fish
Batfish
Ogcocephalidae · also called deep-sea batfish
A batfish shuffles slowly across the seafloor on fins that work more like small legs than swimming paddles, pausing to wiggle a tiny built-in lure on its snout. A curious smaller fish drifts close to investigate, and the batfish barely needs to move to end the encounter.
Overview
Batfish, family Ogcocephalidae, are seafloor-dwelling fish found across tropical and temperate ocean habitat worldwide. Their leg-like walking fins and anglerfish-style hunting lure set them apart from nearly every other fish family in the ocean.
Built to walk, not swim
Where most fish rely on speed and open-water swimming to survive, the batfish has traded almost all of that mobility for a slow, deliberate, ambush-based lifestyle, walking rather than swimming across the very seafloor it depends on for camouflage and cover.
Status
Least Concern — widespread across suitable seafloor habitat in tropical and temperate oceans worldwide.
Batfish: common questions
How does a batfish move around instead of swimming?
A batfish uses its modified pectoral and pelvic fins, which function much like small legs, to walk slowly across the seafloor rather than swimming through open water in the manner typical of most fish, an unusual mode of locomotion suited to its sedentary, seafloor-dwelling lifestyle.
Does a batfish really have its own fishing lure?
Yes, a batfish possesses a small, specialised lure called an illicium positioned on its snout, which it can wiggle to attract curious prey close enough to be captured in a rapid, short-range strike, a hunting adaptation it shares with its more famous anglerfish relatives.
Is the batfish related to the anglerfish?
Yes, the batfish belongs to the same broader order of fish as anglerfish, sharing the general strategy of using a modified fin ray as a prey lure, despite the two groups differing considerably in overall body shape, typical habitat depth, and general appearance.
Where is the batfish typically found?
Batfish species are found across tropical and temperate ocean seafloor habitat worldwide, generally at moderate to deep depths on sandy, muddy, or rubble-covered bottoms where their flattened, disc-shaped bodies and slow walking movement suit the largely stationary lifestyle of the group.