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Sea Slugs

Sacoglossa

Sacoglossa



Index

Sea Slugs



Side-Gilled

Side-Gilled Slugs

Umbrella Shells

Umbrella Shells

Head-shield Slugs

Head-shield Slugs

Pteropods

Pteropods

Sap-Sucking Slugs

Sap-Sucking Slugs

Sea Hares

Sea Hares

Nudibranchs



Phanerobranch Dorids

Side-Gilled Slugs

Cryptobranch Discodorids

Cryptobranch Discodorids

Cryptobranch Chromodorids

Cryptobranch Chromodorids

Radula-less Dorids

Radula-less Dorids

Arminids

Arminids

Dendronotids

Sap-Sucking Slugs

Aeolids

Aeolids

The sap-sucking slugs do just that - suck the sap out of various marine algae. One genus, Ercolania, is so specialised that some species acutally live inside the host alga and eat it from the inside out.

Some species are highly cryptic (Elysia tomentosa), while others, although small, have gained fame among underwater photography because of their colours and shape. "Sean the sheep" (Costasiella kuroshimae) and the Butterfly Cyerce (Cyerce nigricans) are cases in point.

Oxynoidae



Thesse have an oval shell, and a very long thick tail. For defense, they secrete toxic/iritant chemicals, or, like a lizard, can shed part of their body, which keeps twitching while the animal crawls to safety.

Oxynoa cf. viridis
Lobiger souverbii
Lobiger viridis

Caliphyllidae



The best known genus here is Cyerce. These have flattened, often very colourful cerata which they move backwards and forwards like a butterflys' wing as they move.

Cyerce nigra
Cyerce sp. nov. aff. bourbonica
Cyerca sp. nov. aff. elegans
Cyerce sp.
Polybranchia cf. jannae
Polybranchia scf. orientalis

Limapontiidae



Costastiella of "Sean the Sheep" fame, the colourful Stilliger spp. and the parasitic Ercolania spp. belong to this family.

They almost all have many cerata. Their "eyes" are located behind the rhinophores.

Costasiella kuroshimae
Costasiella kuroshimae
Costaciella cf. usgi
Costasiella cf. usagi
Costasiella sp.
Ercolania endophytophaga
Stilliger ornatus
Stilliger ornatus
Stilliger sp. nov.
Stilliger sp.

Plakobranchidae



In addition to Plakobranchus, Elysia and Thuridella belong to this family. They are all algae eaters that lack cerata.

Elysia marginata
Elysia cf. pusilla
Elysia tomentosa
Elysia cf. tomentosa
Elysia sp. 18 (Gosliner et al. 2018)
Elysia sp.
Plakobranchus ocellatus
Thuridella albopustulosa
Thuridella flavomaculata
Thuridella gracilis
Thuridella gracilis
Thuridella cf. gracilis

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Oxynoidae

Oxynoidae

Thesse have an oval shell, and a very long thick tail. For defense, they secrete toxic/iritant chemicals, or, like a lizard, can shed part of their body, which keeps twitching while the animal crawls to safety.

Oxynoa cf. viridis
Lobiger souverbii
Lobiger viridis

Caliphyllidae

Caliphyllidae

The best known genus here is Cyerce. These have flattened, often very colourful cerata which they move backwards and forwards like a butterflys' wing as they move.

Cyerce nigra
Cyerce sp. nov. aff. bourbonica
Cyerca sp. nov. aff. elegans
Cyerce sp.
Polybranchia cf. jannae
Polybranchia scf. orientalis

Limapontiidae

Limapontiidae

Costastiella of "Sean the Sheep" fame, the colourful Stilliger spp. and the parasitic Ercolania spp. belong to this family.

They almost all have many cerata. Their "eyes" are located behind the rhinophores.

Costasiella kuroshimae
Costasiella kuroshimae
Costaciella cf. usgi
Costaciella cf. usgi
Costasiella sp.
Ercolania endophytophaga
Stilliger ornatus
Stilliger ornatus
Stilliger sp. nov.
Stilliger sp.

Plakobranchidae

Plakobranchidae

In addition to Plakobranchus, Elysia and Thuridella belong to this family. They are all algae eaters that lack cerata.

Elysia marginata
Elysia cf. pusilla
Elysia tomentosa
Elysia cf. tomentosa
Elysia sp. 18 (Gosliner et al. 2018)
Elysia sp.
Plakobranchus ocellatus
Thuridella albopustulosa
Thuridella flavomaculata
Thuridella gracilis
Thuridella gracilis
Thuridella cf. gracilis