British marine biologist and photographer Richard Smith focuses his work on the ocean’s tiniest and weirdest creatures.

Gnathiids and other external parasites are such a threat on coral reefs that cleaner fish have developed a niche eating the parasites of larger fish at cleaner stations. Much of Grutter’s ...

This study focused on relict fish species that survived climatic ... Ectoparasite: A parasite that lives on the external surface of its host, as opposed to endoparasites, which live inside the ...

Metazoan parasites, including various types of worms and flatworms, are common in freshwater fish species and can significantly impact fish health and aquaculture. Recent research has focused on ...