We know who lives inside wild fish. We don’t know what happens in there

Published on September 3, 2026 5:05 PM GMTGrouper (Epinephelus sp.). Groupers can host a wide range of parasites, including anisakids and myxozoans. Photo: LDLP.This post was originally published on my Substack. I’m sharing it here because parasite–host interactions in wild fish may have substantial and largely neglected welfare implications, while we still know remarkably little about the experiences of the animals involved. The post is intended mainly to highlight this empirical gap and some p...