Dirona albolineata

The White or Frosted Nudibranch.

Phylum Mollusca
Class Gastropoda
Subclass Opisthobranchia
Order Nudibranchia
Suborder Arminoida
Family Arminidae
Genus Dirona
Species albolineata

Description: 5 to 6 cm long; colorless and nearly translucent with prominent cerata covering the body; the cerata are flat, pointed, and outlined in bright white.

Habitat: Found on rocky shores near low-tide lines; on pilings and docks, and other places where its prey can be found.

Natural History: This species has strong jaws which it uses to crush snails, its main source of prey. It also feeds on bryozoans, ascidians and sea anemones. It was found at Boston Harbor Marina one early evening in late summer.