Why Isn’t Cryptocaryon irritans a Major Problem for Wild Marine Fish?

During yesterday’s Thanksgiving get-together, which my wife and I host for my side of the family every year, a teenaged nephew asked me about marine ich (Cryptocaryon irritans)—the one fish disease he’s heard something about from a friend who keeps saltwater tanks. As I explained the parasite and its lifecycle and why I think it’s … [Read More]

Fish Health Through Slime

Fish diseases—they are the meat of fish forums and the subject that takes up the most ink (or whatever causes words to form on a computer screen), so for today’s post, I am going to discuss fish immunity in relation to fish slime. Fish, like every organism, have an immune system that is specifically designed … [Read More]

A Fishy Biology Lesson From Paul

Though fish are our distant cousins, there are more differences than similarities between us. In today’s post, I’d like to explore the various characteristics that make a fish a fish—or not. Skeletal distinctions Of course, not all fish are the same and the oldest fish are not truly fish. True fish have bones somewhat like … [Read More]