Ercolania zanzibarica explained

Ercolania zanzibarica is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusk in the family Limapontiidae.

Charles Eliot caught two specimens at Chuaka, on the eastern coast of Zanzibar, in February 1901.^[1]

Notes and References

1. Eliot . C. . 1903 . On some Nudibranches from East Africa and Zanzibar . Proceedings of the Zoological Society of London . 256–257 . Internet Archive.