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Pteropoda (common name pteropods, from the Greek meaning "wing-foot") are specialized free-swimming pelagic sea snails and sea slugs, marine opisthobranch gastropods.Most live in the top 10 m of the ocean and are less than 1 cm long.
Limacina retroversa is a distinct species of swimming planktonic gastropods, belonging to a group of predatory sea snails known as sea butterflies (Thecosomata). The name Limacina retroversa describes the unique morphology of this sea snail, including its slug-like body and coiled, backwards-turning shell. They are typically found in the ...
A species of sea snail in its natural habitat: two individuals of the wentletrap Epidendrium billeeanum with a mass of egg capsules in situ on their food source, a red cup coral. A sea snail Euthria cornea laying eggs. Sea snails are slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone.
Limacina helicina is a species of small swimming planktonic sea snail, in the family Limacinidae. It belongs to the group commonly known as sea butterflies (Thecosomata). [7] [8] Limacina helicina is a keystone species of mesozooplankton in Arctic pelagic ecosystems. [9] [10] [11]
Limacina is a genus of swimming predatory sea snails commonly known as sea butterflies in the family Limacinidae. This genus contains some of the world's most abundant gastropod species. [2] [3] Etymological meaning of the generic name Limacina is "snail-like". [4]
The sea butterflies form the sole food source of their relatives, the Gymnosomata. [8] They are also consumed by sea birds, whales, and commercially important fish. However, if sea butterflies are consumed in large quantities fish can get "black gut", which makes them unsellable. [1]
The problem is that most structures have to be fairly big so they're weaker than we would like. Limpet teeth break this rule as their strength is the same no matter what the size.'" So, small, but ...
The processor buys in bulk from the collector, involving a possibly long transport route by land in a refrigerator truck or airplane, taking care to avoid temperatures below 0°C. If fresh seawater is readily available, the periwinkles are first graded if possible, using a machine custom built for the purpose.