Original sentence: Elysia is a taxonomic genus of sea slugs, marine opisthobranch gastropod mollusks.Instead they are sacoglossans.These animals are colorful sea slugs, and they can superfically resemble nudibranchs, but are not closely related to them
Edited sentence: Elysia is a taxonomic genus of sea slugs, marine opisthobranch gastropod molluscs.Instead they are sacoglossans, commonly known as sap-sucking slugs.These animals are colorful sea slugs, and they can superfically resemble nudibranchs, but are not very closely related to them