Interesting Facts About Hexanchus Shark Hexanchus shark or commonly known as sixgill shark is a large, deepwater
primitive
species of sharks found only as fossils. It has distinctive broad, flat head, large green eyes, and a small, single dorsal fin far along its back. It usually feed nocturnally and lives at depths. There has been no reports of sixgill shark harming humans so far. Below are some lesser known facts of Hexanchus: Comb like teeth These sharks are characterized by a broad, pointed head, six pairs of gill slits, comb-like, yellow lower teeth, and a long tail. Sixgill teeth are very different
compared to what we
typically a shark teeth should look like. They had six saw-like teeth on each side of the lower jaw and nine smaller, serrated, single-cusped teeth on each side of the upper jaw. You can find Hexanchus tooth for sale.
The name is because of its gills The name of the shark comes from the presence of six gills, compared to the five found on other sharks. This characteristic is common with prehistoric shark forms than with modern-day sharks, along with the presence of a translucent eyelid and position of the dorsal fin closer to the tail. Slow swimmer The sixgill shark is a slow yet strong swimmer. The sjhark is among the list of
fierce hunters,
and prefers to stay aware of its own predators. There potential threats include the Stellar’s sea lion (Eumetopias jubatus), killer whale (Orcinus orca), and the white shark (Carcharodon carcharias). Prefer deep water The sixgill shark prefers deep-water habitats, below 91 m (300 ft), though it can be found from the surface down to at least 2,000 m deep (about 6,500 ft). Adults sharks usually tend to have daily cycles of vertical migration during the daytime they rest on the sea bottom, and at night they move into shallow waters or close to the surface to feed. Anti- social One aspect of its interactions with other species that has been studied is parasitism. Internal parasites of the shark that have been documented include nematodes and other parasitic worms within the digestive system. External parasites include copepods (tiny crustaceans) that feed on the shark’s head and fins. Such interactions are usually classified as anti-social. However, very little information exists about this sharks distribution patterns, migrations and behavior. The collected data from many oceanographic surveys believes their existence in the waters of north of Spain (Galicia and Cantabrian Sea, NE Atlantic) .