Genus
Common name: Gnathiid Isopods
Scientific name: Gnathia
Gnathia is a genus of isopods that are known for their parasitic lifestyle during their juvenile stages. They typically target fish, feeding on their blood and causing irritation. In a reef aquarium, they can be problematic if their population is not controlled. However, they also play a role in the natural ecosystem by helping to keep fish populations healthy by weeding out the weak and sick. Hobbyists should monitor their presence and manage their numbers to prevent infestations.