Kosmoceras

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Posts tagged pelagic

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Janthina janthina, or violet snail, is an unusual, pelagic species of shelled gastropod. It floats right below the ocean’s surface, flotation being afforded by its secreted mucus-and-bubble raft. As such, it exploits a niche that remains largely untouched by other gastropods, save perhaps the blue nudibranchs from family Glaucidae. The snail consumes floating cnidarians, including Physalia (Portuguese-man-o-war), Porpita (blue buttons) and Velella (by-the-wind-sailor). Photo by Dimitrios Poursanidis. Further reading

Janthina janthina, or violet snail, is an unusual, pelagic species of shelled gastropod. It floats right below the ocean’s surface, flotation being afforded by its secreted mucus-and-bubble raft. As such, it exploits a niche that remains largely untouched by other gastropods, save perhaps the blue nudibranchs from family Glaucidae.

The snail consumes floating cnidarians, including Physalia (Portuguese-man-o-war), Porpita (blue buttons) and Velella (by-the-wind-sailor).

Photo by Dimitrios Poursanidis.
Further reading

Filed under janthina janthinidae snail gastropoda janthina janthina violet purple violet snail purple snail pelagic holopelagic gastropod mollusca mollusk dimitrios poursanidis

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This is Chaetopterus pugaporcinus, a deep-sea dwelling marine worm. The distinct, almost spherical morphology is due to the worm’s central portion, which is segmented yet highly inflated. It is unknown whether the specimens discovered by MBARI scientists were mature individuals or larvae. The species name means “pig’s rear”, which I think is very apt. Pelagic, it floats around the water column despite the intense pressure of oceanic depths. 
It is about the size of a hazelnut.
Pigbutt or Flying Buttocks is the common name, according to Wikipedia (I have no idea who wrote the article).

This is Chaetopterus pugaporcinus, a deep-sea dwelling marine worm. The distinct, almost spherical morphology is due to the worm’s central portion, which is segmented yet highly inflated. It is unknown whether the specimens discovered by MBARI scientists were mature individuals or larvae. The species name means “pig’s rear”, which I think is very apt. Pelagic, it floats around the water column despite the intense pressure of oceanic depths. 

It is about the size of a hazelnut.

Pigbutt or Flying Buttocks is the common name, according to Wikipedia (I have no idea who wrote the article).

Filed under chaetopterus pugaporcinus chaetopterid worm deep sea pelagic pigbutt flying buttocks buttworm DAT ASS

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Limacina helicina 3 by Alexander Semenov.
Limacina helicina is a species of pteropod mollusk. ‘Pteropod’ is basically a catch-all term for all kinds of free-swimming, pelagic sea snails, usually ones with modified, wing-like foot. The sea angel Clione limacina has also been referred as a ‘pteropod’. However, its usage as taxonomic term has now become obsolete.

Limacina helicina 3 by Alexander Semenov.

Limacina helicina is a species of pteropod mollusk. ‘Pteropod’ is basically a catch-all term for all kinds of free-swimming, pelagic sea snails, usually ones with modified, wing-like foot. The sea angel Clione limacina has also been referred as a ‘pteropod’. However, its usage as taxonomic term has now become obsolete.

Filed under limacina helicina sea butterfly pteropod pelagic gastropod alexander semenov plankton