| Sap-sucking slug | |
|---|---|
| |
| A live individual of Elysia viridis on brown algae. | |
| |
| Four live individuals of Elysia viridis | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | Plakobranchidae |
| Genus: | Elysia |
| Species: | E. viridis
|
| Binomial name | |
| Elysia viridis (Montagu, 1804)
| |
Elysia viridis, the sap-sucking slug, is a small-to-medium-sized species of green sea slug, a marine opisthobranch gastropod mollusc in the family Plakobranchidae.
This sea slug resembles a nudibranch, but it is not closely related to that clade of gastropods. It is instead a sacoglossan.