6. Giant Squid
The elusive giant squid, known to science as Architeuthis dux, is one of the world's largest animals, reaching a length of up to 60 feet. It is the largest known Invertebrates in the world. The giant squid is a mollusk and is member of the cephalopod class, which includes the octopus and other squids. Very little is known about these mysterious animals because none have been seen alive in the wild. Most of what we know about them comes from the bodies of dead squid that have washed ashore or been pulled up in fishermen's nets. These animals are carnivores, and will eat just about anything they can catch. During World War II, stories from the survivors of sunken ships tell of shipmates being eaten by these creatures in the dark of night. There have even been reports of giant squid reaching out of the water and pulling men off small boats. None of these reports have been officially verified, but they paint a picture of a powerful predator. The squid's eight long tentacles have strong suction cups, which they use to hold on to their prey. A sharp, powerful beak finishes off their helpless victim with eerie efficiency. The giant squid appears to be a favorite meal for the sperm whale. They have been found in the stomachs of dead whales and many these whales bear scars from the squid's suction-cupped tentacles.
7. Giant Isopod
The giant isopod, known scientifically as Bathynomus giganteus, is the largest known member of the isopod family. It is very closely related to the small pillbugs that you can find in the garden. It is a carnivorous crustacean that spends its time scavenging the deep ocean floor. Food is extremely scarce at these great depths, so the isopod has adapted to eat what ever happens to fall to the ocean floor from above. It will also feed on some of the small invertebrates that live at these depths.
The coffinfish (B.melanostomus) has a flabby body and long tail that are both covered with small spines. It has a black mouth lining and an illicium (glossary) on the snout that can be lowered into a groove. This species grows to at least 10cm in length. B.melanostomus has been trawled in the Central to Eastern Indian Ocean at depths ranging from 1320m to 1760m. The name melanostomus comes from the Greek melanos meaning black and stoma meaning mouth. There are two genera in the family Chaunacidae; Bathychaunax and Chaunax. Bathychaunax differs from Chaunax by having a lower lateral line count, longer ilicium, a wider head, more widely spaced body spines and several skeletal characters.
9. Vampire Squid
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10. Long-nosed Chimaera
Biologists have gone to great lengths to describe the long-nosed chimaera, Harriotta raleighana, whose kind can reach five feet in length. Its stiletto-like nose reminded one of "the nose contour of a supersonic jet aircraft." Others have dubbed it "rattail," for obvious reasons. In South Africa, it is known as the "ghost shark," though it is only distantly related to sharks. A touch of the venomous spine on the first dorsal fin can kill a person, though such a fate is unlikely given the 8,000-foot depths at which this creature lives.