Parasites | Fossa Method
Goussia coccidia in fish

Fish coccidia: Goussia

Oocysts with elongated sporozoites are characteristic of Goussia. Microscopy-based interpretation and diagnostic features.

April 15, 2026 · 3 min
Fish necropsy: myths and reality

Is It Ever Too Late for a Fish Autopsy?

Toggle Myth / Reality Myth “Only Fresh Fish Can Be Examined” There’s a common belief that if a fish dies in an aquarium, an autopsy is pointless. It’s often claimed that you must dissect immediately after death, otherwise nothing useful can be learned. The reasoning goes like this: fish decompose very quickly at room temperature — within minutes, tissues change, organs lose structure, and parasites either die or abandon the host. ...

July 21, 2025 · 4 min