Phestilla melanobrachia aeolid is a nudibranch an underwater snail without a house or shell. It has both black and bright orange-yellow color forms. Happy I caught the black one, the color matching the color of the dendrophylliid coral (Tubastrea, Dendrophyllia) on which specimens are feeding.

On one picture you can see how it does lay eggs. They are tiny but if you look closely you might be able to see them.

 

Phestilla melanobrachia aeolid

Laying eggs

Phestilla melanobrachia aeolid with eggs