Gonostomatidae

Gonostomatidae is a family of small marine fishes, commonly called bristlemouths, found in deep waters throughout the world's oceans. Many species have luminous organs and upward-pointing mouths.

Stomiiformes: Stomiiformes is an order of mostly deep-sea fishes that includes bristlemouths, dragonfishes, and lightfishes. Gonostomatidae belongs to this deep-sea fish order.
Diel vertical migration: Diel vertical migration is the regular daily movement of animals between deeper water by day and shallower water at night. Many bristlemouths rise toward surface waters after dark to feed.
Midwater trawling: Midwater trawling uses nets to sample animals suspended in the water column rather than on the seabed. Researchers use it to collect bristlemouths and estimate their distributions.
Cyclothone: Cyclothone is a genus of small bristlemouth fishes found in deep ocean waters worldwide. It is among the most abundant vertebrate genera in the world's oceans.
Lanternfish: Lanternfish are small mesopelagic fishes in the family Myctophidae, many of which bear light-producing organs. They share deep-water luminosity with bristlemouths but belong to a different fish family.
Bristlemouth: Bristlemouth is the common name for fishes in the family Gonostomatidae. This common name highlights their prominent, needle-like teeth.
Zooplankton: Zooplankton are drifting animals and animal-like organisms in aquatic ecosystems. Small drifting animals are major prey for bristlemouths.
Acoustic survey: An acoustic survey uses transmitted sound and returning echoes to estimate underwater animal distributions or abundance. Bristlemouth aggregations can contribute to acoustic signals from deep scattering layers.
Cyclothone microdon: Cyclothone microdon is a species of bristlemouth fish in the family Gonostomatidae. This widespread species exemplifies the family's small-bodied deep-sea fishes.
Dragonfish: Dragonfish are predatory deep-sea fishes in the suborder Stomiatoidei, often bearing luminous organs and large teeth. They are related stomiiform fishes but are generally larger and more specialized predators.

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CounterilluminationRelated: Bristlemouths are among the fishes whose underside light can obscure their shape.