![]() Marine hatchetfishes are found at depths ranging from 50 to 1,500 m. This counter-illumination eventually helps these creatures escape predators that move in these deep depths. These photophores allow the creatures to regulate the brightness of their glow, matching the intensity of light penetrating from above. These small, deep-sea creatures have an unusual body shape and possess bioluminescent photophores. Ranging in size from 2.8 cm to 12 cm, the marine hatchetfishes are found in the tropical, temperate, and subtropical waters of the Atlantic, Indian, and Pacific Oceans. Image credit: via Wikipedia.Īlso referred to as deep-sea hatchet fishes, marine hatchetfishes are small, ray-finned fishes that belong to the subfamily Sternoptychinae. Marine Hatchetfish CaptionHalf-naked hatchetfish, Argyropelecus hemigymnus eating a shrimp. The following article discusses some of these mysterious yet fascinating deep-sea creatures. Much deep-sea fauna is still unknown and is yet to be discovered by scientists. However, despite such extreme conditions, different faunal creatures live in the deep sea and have special adaptations that help them survive in the fathomless depths of the ocean. Even at depths of 150 m below sea level, the light levels are reduced to 1% of the surface, which makes it insufficient to support photosynthesis. ![]() Moreover, no light penetrates the ocean waters at depths beyond 1000 m below sea level. Cold temperatures, darkness, high hydrostatic pressures, low oxygen concentrations, and food scarcity characterize the habitat of the deep sea. The deep sea, considered the Earth's largest habitat, reaches an average depth of more than 4000 m.
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