The intestinal photophore
was visible only in some individuals because most specimens were in poor condition.
Claes said that there are two spines, one in front of each dorsal fin, and just behind them they have two rows of photophores
, which are like lightsabers - they illuminate the spine.
1992) and Yatsu (3) used proboscis length and photophores
as distinguishing characters, but the muscular proboscis can extend and retract (Staaf et al.
Flashlight fishes, plankton feeders in shallow tropical waters, have large suborbital light organs called photophores
have a definite pattern and are apparently used for social and sexual signaling.
But (3,281 to 13,123 ft) many creatures are bioluminescent (body produces light through photophores
, light- producing organs).
Like the majority of deep-sea species, most anglerfish can flash or glow an eerie blue or red light using gland-like organs called photophores
embedded beneath the skin.