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Sea angels were previously considered to be pteropods. Sea angels are also sometimes known as "sea butterflies" but this is potentially misleading because the family Clionidae is just one of the families within this clade, and the term "sea butterfly" is also applied to the shelled Thecosomata.
Clione limacina, known as the naked sea butterfly, sea angel, and common clione, is a sea angel (pelagic sea slug) found from the surface to greater than 500 m (1,600 ft) depth. [ 2 ] [ 3 ] It lives in the Arctic Ocean and cold regions of the North Atlantic Ocean .
The Notobranchaeidae, or "naked sea butterflies", are a taxonomic family of floating sea slugs, specifically under the subclass Opistobranchia, also called "sea angels". [1] [2] Similar to other Pteropods, these pelagic marine heterobranch gastropod mollusks [3] are holoplanktonic. [4] [5]
Sea butterfly pseudoconch. The group is known within the fossil record from shells of those groups within the clade that mineralized. [12] [13] These carbonate shells are a major contributor to the oceanic carbon cycle, making up as much as 12% of global carbonate flux. [3]
Clionoidea is a taxonomic superfamily of sea slugs, specifically naked (i.e. unshelled) pteropods, marine opisthobranch gastropod mollusks in the clade Gymnosomata. [1] They are sometimes called "sea angels" or "naked sea butterflies" along with the other superfamily in the Gymnosomata. They can be found anywhere from the surface to a depth of ...
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.
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As pelagic marine gastropods, Limacina swim by flapping their parapodia, inspiring the common name sea butterflies. Sea butterflies are part of the clade Thecosomata. Sea angels, similar to Limacina, are in the order Gymnosomata. Both of these orders are still referred to as "pteropods". Sea butterflies of the order Thecosomata have a shell ...