⇐ Sea slugs
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  • Polycera quadrilineata
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  • (Hydatina physis), Another primitive sea-slug, we can see in this species how the body is becoming more prominent than the shell. This represents a stage in the process by which 'snails' have evolved into 'slugs'. This common tropical species feeds on polychaete worms (30mm).
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  • (Cerberilla sp.)
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  • (Halgerda malesso)
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  • (Pteraeolidia ianthina) Commonly known as the 'blue dragon' by divers in eastern Australia, this aeolid is one of a group of remarkable nudibranchs which are way ahead of man in harnessing solar energy. It has evolved a method of capturing and farming microscopic plants (zooxanthellae) in its own body. The plants flourish in this protected environment and as they convert the sun's energy into sugars, they pass a significant proportion on to the nudibranch for its own use. The white animal is a juvenile which as not yet developed its crop of zooxanthellae.
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  • (Polycera quadrilineata)
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  • (Hypselodoris bullockii)
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  • (Polycera quadrilineata)
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  • (Chromodoris annae)
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  • CX2H4699
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  • (Chromodoris dianae)
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  • (Chromodoris sp.)
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  • (Hypselodoris bullockii)
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  • (Chromodoris geometrica)
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  • (Phyllodesmium briareum)
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  • (Flabellina rubrolineata) Aeolid nudibranchs can be recognised by the long tubular 'cerata' which grow out from their body. Each 'ceras' usually has a tube-like branch of the gut running to its tip. In those species, such as Flabellina, which find on hydroids and other stinging cnidarians, there is a sac at the tip of each ceras which contains stinging cells removed from the cnidarian (30mm).
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  • (Nembrotha purpureolineolata)
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  • (Jorunna funebris)
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  • (Chromodoris annae)
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  • (Chromodoris annae)
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  • (Risbecia tryoni)
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  • (Nembrotha kubaryana)
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  • (Ceratosoma tenue)
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  • (Chromodoris sp.)
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  • (Glossodoris cincta)
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