Washington State University

Dear J.P., Not only do fish pee, but their pee gives other animals in the ocean what they need to survive. That’s what I found out from my friend, Cori Kane, a marine biologist at Oregon State University who got her Ph.D. at Washington State University. She knows a lot about coral reefs in our … Read more

Do Fish Pee?

Your cart is currently empty! Do Fish Pee? Contrary to popular belief, fish poo and pee isn’t the same thing. Table of Contents Do Fish Pee? Like most living vertebrates, fishes do in fact pee. Fishes have two kidneys located above their swim bladder that filter waste from their blood. This waste is then discarded … Read more

Fish physiology

Fish physiology Fish physiology is the scientific study of how the component parts of fish function together in the living fish.[2] It can be contrasted with fish anatomy, which is the study of the form or morphology of fishes. In practice, fish anatomy and physiology complement each other, the former dealing with the structure of … Read more

Do fish pee?

When I was doing research on the aquarium’s nitrogen cycle, there were a lot of articles talking about fish feces being a big source for ammonia diluted in your water. This raised a question that I had never thought of: do fish pee? It differs on the species of fish, but even more on the … Read more


Euryhaline Euryhaline organisms are able to adapt to a wide range of salinities. An example of a euryhaline fish is the molly (Poecilia sphenops) which can live in fresh water, brackish water, or salt water. The green crab (Carcinus maenas) is an example of a euryhaline invertebrate that can live in salt and brackish water. … Read more