Pseudocheilinus ocellatus, the mystery wrasse (aka the tail-spot wrasse, white-barred wrasse, or five-barred wrasse), is somewhat uncommon in the hobby and usually priced accordingly. But if you can get past the sticker shock for such a modest-sized fish, you’ll find…
Marine/Saltwater Fish
Salty Q&A: Harlequin Tuskfish Ate My Cleaner Shrimp!
Question Two weeks ago, I added a harlequin tuskfish to my 90-gallon reef tank with the understanding that it’s a peaceful fish. Then this morning, the stupid thing ate my skunk cleaner shrimp right in front of me! Was I…
Indigo Hamlet: A Comely Sea Bass Suited to Modest-Sized Systems
The family Serranidae, the sea basses (not to be confused with a certain film character portrayed by Cam Neely), is a diverse assemblage of fishes ranging in size from tank-busting “bruisers” to diminutive species that are well suited to life…
Salty Q&A: Calcium and Alkalinity Out of Whack
Question I’m having an issue with the calcium and alkalinity levels in my reef tank. Right now, the calcium is at 380ppm, which is at the low end of the acceptable range, and the alkalinity is at 10dKH, closer to…
5 Circumstances that Warrant a Species (or Specimen) Tank
A diverse community of marine fishes presents quite a visual feast, especially when housed in a reef system brimming with colorful corals. However, in some stocking situations, it’s preferable to avoid the “typical” marine community (if there is such a…
Fish Disease Symptoms Aren’t Always What They Seem
Most marine aquarium hobbyists keep a close eye on their fish for certain tell-tale signs of ill health. And that’s a good thing, since quick intervention in the case of fish disease can often be the difference between life and…
The Signal Goby: A Master Mimic with a Sketchy Captive Survival Record
The signal goby (Signigobius biocellatus), aka the twin-spot, two-spot, or crab-eye goby, is an appealing little sand sifter with fascinating behavior that, unfortunately, often adapts very poorly to aquarium life. Nonetheless, specimens still appear in the aquarium trade, so it’s…
Dissolved Gases in Marine Aquaria: Saturation Problems and Solutions
If you’re like most marine aquarium hobbyists, you probably don’t give a great deal of thought to the levels of dissolved gases in your system beyond making sure you’re providing good aeration and circulation. But under certain circumstances, these levels…
Salty Q&A: How Often Should Your Fish Fast?
Question I’ve been told that it’s a good idea to avoid feeding aquarium fish on occasion, for example once every week or once every other week. I guess this stands to reason because fish in nature can’t always get a…
I Wish I Were a Fish—with a Lateral Line System!
Everything about fish is amazing and fascinating. To me, the most fascinating thing about fish (beside their taste) is their lateral line system. The lateral line is the most important thing fish possess because without it, they would get around…