Thecacera picta is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusk in the family Polyceridae.
The type locality for this species is Suruga Bay, Japan.
- ^ a b Baba K. (1972). "Thecacera picta spec. nov. from Suruga Bay, Japan (Nudibranchia: Doridoidea: Polyceridae)". The Veliger 15(2): 88-90.