Source: Bestiary 5, pg(s). 49
The cameroceras is a giant deep-dwelling nautilus with a long shell.
The average cameroceras is 25 feet long, the majority of which is its long, hollow shell. Most cameroceras weigh 2,000 pounds. In addition to its grabbing tentacles, a cameroceras has four tentacles that grant it a keen sense of smell. Its shell can tolerate the pressure of up to one mile beneath the surface, though it cannot survive for long at greater depths.
Cameroceras are ambush predators often found in the mesopelagic zone of the ocean, but occasionally come nearer to the surface to hunt. When a cameroceras catches prey, it can wrap it in its tentacles and pull it into its shell while diving to feed at its leisure.
- Wikipedia:Cameroceras (extinct real-world animal)