Rhynchozoon haha is recorded from the Indian Ocean, Australia and the Solomon Islands. Specimen from the Gulf of Aden. The SEM images are kindly provided by Ann-Margret Amui.
Original description: Rhynchozoon haha Hayward, 1988
Locality: Mauritius
Holotype: BMNH 1987.1.18.11; Paratypes: BMNH 1987.1.18.20, 22, 1996.4.25.17.
Description from Tilbrook, 2006. (PDF file)