Noun
orthonectid (plural orthonectids)
(zoology) Any of the Orthonectida, a small phylum of parasites of marine invertebrates.
J Parasitol 96(3):614-625 Orthonectid mesozoans main Orthonectida are found in the body spaces of various marine invertebrates including tissue spaces, gonads, genitorespiratory bursae. Source: Internet