Nautilidae Animal Facts and Pictures

Nautilidae Animal

The http://www.stoveglass.net/illustrator/electrodeworks-2016-software/ best price Microsoft Office Home & Business 2013 go site http://ulols.com/qehovun Atrovent Over Counter http://www.aimclasses.com/how-to-get-ofloxacin-online Nautilidae Animal is the last of a vanishing line of cephalopods once abundant approximately 400 million years ago. Nautilidae Animal pompilus is known as the pearly nautilus. Nautilidae Animal Shell diameter up to 10 inches (25 cm), A Nautilidae Animal along with the cuttlefish, squid, and octopus, are all cephalopods, meaning “head-foot,” Nautilidae Animal so named because the feet (tentacles) are attached to the head.

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Nautilidae Animal Facts:

Common name: Nautiluses

Order: Tetrabranchia

Subclass: Nautiloidea

Class: Cephalopoda

Phylum: Mollusca

Number of species: About 6

Size: Shell diameter up to about 10 in (25 cm)

Key features: Conspicuous coiled, external shell divided into many chambers, outer surface of shell usually beautifully patterned, internal surface mother-of-pearl; adult body housed in the largest, newest chamber, older chambers help regulate buoyancy; head bears 80-90 suckerless tentacles protected by a hood; in males 4 tentacles are adapted to form the “mating arms” (the spadix); mantle cavity and siphon used in “jet propulsion”; mantle cavity contains 4 gills, eyes not as well developed as in squids and octopuses, and lack cornea and lens, functioning more like a pinhole camera; brain, statocyst, and nervous system also less well developed

Habits: Adults are midwater predatory marine animals, found at various depths from shallow water down to 2,300 ft (700 m)

Breeding: Sexes separate; mating achieved by the male transferring a packet of sperm into the female’s mantle cavity using a group of modified arms; eggs laid on seabed; planktonic larval phase is present

Diet: Carnivorous, relying on senses to detect mobile prey which often includes crustaceans