is a species of deep-sea hydrothermal vent snail, a marine gastropod mollusc in the family Peltospiridae.This vent endemic gastropod is known only from deep-sea hydrothermal
vents in the Indian Ocean, where it has been found at depths of about
2,400 m (1.5 mi).
The shell is of a unique construction with three
layers; the outer layer consists of iron sulphides, the middle layer is equivalent to the organic periostracum found in other gastropods, and the innermost layer is made of aragonite. The foot is also unusual, being armored with iron-mineralised sclerites. The snail’s tissues house a symbioticgammaproteobacteria from which it appears to obtain its nourishment…
AKA ram’s horn squid. Probably my favorite cephalopod. A disappointing number of pictures available to reference, considering it has an important evolutionary relic - an internal spiral shell. It also has a yellowish-green photophore at the end of its mantle and a vertical-oriented swimming style. The juveniles are able to withdraw their head and arms entirely into their mantle when startled. The adult is not much bigger than your thumb, and its shell is found on beaches all over the world.
Huyck Preserve in NY has a great program where they allow an artist residency for two weeks in exchange for one illustration created during their stay. There was a lot to see, a lot to learn from the biologists and the other artists. I’m definitely looking into seeing if other field stations will do this kind of thing.