Tentacles
The arm crown of modern nautilids (genera Nautilus and Allonautilus) is very distinct in comparison to coleoids. Unlike the ten-armed See more

Range and habitat
Nautiluses are only found in the Indo-Pacific, from 30° N to 30° S latitude and 90° E to 175° E longitude. They inhabit the deep slopes of See more

The family Nautilidae contains up to nine extant species and several extinct species:
• Genus Allonautilus
• Genus Nautilus
Genetic data collected in 2011 pointed to there being only … See more

Palauans see nautili (Palauan: kedarm) as a symbol of vulnerable or fragile character from a belief that they easily die even from slight bumps on ocean rocks; hence someone who gets … See more

Buoyancy and movement
To swim, the nautilus draws water into and out of the living chamber with its hyponome, which uses jet propulsion. This mode of … See more

Fossil records indicate that nautiloids have experienced minimal morphological changes over the past 500 million years. Many were initially straight-shelled, as in the extinct genus Lituites. They developed in the Late Cambrian period and became a significant group of … See more

Nautilus are collected or fished for sale as live animals or to carve the shells for souvenirs and collectibles, not for just the shape of their shells, … See more