Marine/Saltwater Fish

The Iconic Raccoon Butterflyfish

Some of the marine fish we like to keep are surprisingly recognizable to both hobbyists and non-hobbyists alike—probably because they’re frequently depicted in photographs and artwork. Among these iconic fishes is the raccoon butterflyfish (Chaetodon lunula) of the Indo-Pacific and…

Spare the Net for These 5 Fish Types

Moving a marine fish from one tank to another is a straightforward process. You grab a fish net of appropriate size, scoop out the specimen, and release it in its new home. At most, you might have to work with…

Sometimes Fish Eat the Funniest Things!

Carnivorous fish eat meat, herbivorous fish eat algae/plants, and omnivorous fish eat both. That’s the order of things, and any fish we buy for our aquariums should fit nicely into one of these categories so we know exactly what to…

Are You in Tankmate Aggression Denial?

Fish wounds and injuries can result from a variety of different influences, with tankmate aggression being among the more commonplace. Unfortunately, hobbyists don’t always recognize this problem right away when it manifests itself. Tankmate aggression This is a potential issue…

Rock Beauty Angelfish: a Finicky Feeder Best Left in the Sea

On one of my earliest dives down in the Florida Keys back in the 1990s, a gorgeous yellow and black angelfish caught my attention as I drifted over a section of reef. In my mind’s eye, I envision the angel…

5 Cleaner Wrasse Myths

The introduction of Labroides spp. cleaner wrasses to marine aquarium systems is generally ill-advised. Though some hobbyists report success in keeping these obligate cleaners long term, the vast majority of specimens entering the market are doomed to perish prematurely from…

In Praise of Fish Oil

Hobby pioneer Paul “Paul B” Baldassano has some strong opinions on what types of foods are best for fish, formed over his many decades of involvement in the marine aquarium hobby. Somewhere near the top of his list is fish…

Some Thoughts on Reclaiming Reverse-Osmosis Waste Water

While reverse-osmosis units are among the more practical, affordable means for producing purified tap water suitable for sensitive reef systems, there’s no question that they tend to generate a lot of waste water relative to the volume of purified product.…

Why Isn’t Cryptocaryon irritants 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…

Finding Dory Release Announced—Is a P. hepatus Craze in Our Future?

Well, the word is out that Finding Dory, the long-anticipated sequel to Disney/Pixar’s Finding Nemo, is finally slated for release in June of 2016. If the impact of the sequel is anything like that of the original—a lot of youngsters…