image credit: David Harasti,

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image credit: richard ling

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Habitat: Eastern Australia
Status: Not listed, but very rare

The “Donut” Nembrotha (Nembrotha rosannulata) is kind of a weird nudibranch. First of all, you can only find this chunky pink and green blob in a few specific locations in Eastern Australia. One spot that seems to be especially sweet for these creatures is Cabbage Tree Island off of Port Stephens in New South Wales, Australia.

On the western side of this island grows a purple ascidian (Sigillina cyanea) which is the only food source that the Donut Nembrotha is known to feed on. So, if you happen to be diving in that area make sure to check out the purple ascidians because you might get lucky and spot the nudibranch!

Adults usually have fluorescent pink rings (or donuts) while juveniles have bright orange ones.