[1] Kudoa are most commonly known and studied for the negative effects the genus has on commercial fishing and aquaculture industries.

[2] The genus Kudoa is identified by the possession of four or more shell valves composed of a fragile membrane and arranged in a quadrate or stellate pattern.

[6] The zygotes become spores with three valves, 3 polar capsules, and a sporoplasm that are released in the worm's feces and attach to the surface of a fish host.

[1] When Kudoa attach to hosts, they leave unsightly cysts that lower the price fish can be sold for at market.

[8] Some species in the genus Kudoa with the most notable effects of the commercial fishing and aquaculture industries are: K. musculoliquefaciens in Broadbill Swordfish (Xiphias gladius), K. thyrsites in Atlantic Salmon (Salmo salar), K. clupeidae in Atlantic Herring (Clupea harengus), K. septempunctata in Olive Flounder (Paralichthys olivaceus), K. thunni in Yellowfin Tuna (Thunnus albacares) and K. paniformis in Pacific Hake (Merluccius productus).