Antigoniidae
Antigoniidae is a family of deep-sea hatchetfishes belonging to the order Stomiiformes. They are commonly known as “bignose hatchetfishes”, a name that refers to their distinctive elongated snouts. These fish are relatively small, with most species measuring between 5 and 15 centimeters in length. They are characterized by their laterally compressed bodies, giving them a hatchet-like shape, and their large, upward-facing eyes that allow them to see in the dim light of the deep sea.
Characteristics
Antigoniidae species possess several unique features that distinguish them from other hatchetfishes. Their most notable characteristic is their elongated snout, which is often longer than their head. This snout is lined with small, sensitive pores that help them detect prey in the murky depths. They also have a prominent photophore, a light-producing organ, located on their chin. This photophore is believed to play a role in attracting prey or communicating with other fish.
Habitat and Distribution
Antigoniidae fish are found in the deep waters of the Atlantic, Indian, and Pacific Oceans. They inhabit a variety of environments, including the abyssal zone, the bathyal zone, and the mesopelagic zone. They are generally found at depths ranging from 500 to 3,000 meters, but some species have been observed at even greater depths.
Diet
Antigoniidae fish are carnivorous, feeding primarily on zooplankton, small crustaceans, and other small fish. They use their sensitive snouts to detect prey in the darkness of the deep sea. Their photophore may also play a role in attracting prey.
Reproduction
Little is known about the reproductive behavior of Antigoniidae fish. They are assumed to be oviparous, meaning they lay eggs. However, no detailed information on their spawning habits or larval development is available.
Classification
The family Antigoniidae comprises six recognized genera:
- Antigonia
- Argyropelecus
- Benthalbella
- Glossanodon
- Polyipnus
- Sternoptyx
These genera contain a total of about 45 species, although new species are still being discovered.