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jeff kurtz
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Some Subtle Signs that a Fish is Sick

Most marine aquarium hobbyists learn quickly to identify common warning signs of ill health in fish—white spots, excessive mucus production, bulging eyes, frayed fins, etc. But sometimes ailing fish exhibit much more subtle symptoms that are evident only to someone…

Marine Aquarium Decorations: Tacky, Tasteful, or Somewhere In-Between?

I’ve always favored very naturalistic aquariums, so when an acquaintance recently asked me what I think about using decorations in saltwater systems, my immediate response (more or less) was that I find them tacky and cringe-worthy and that corals and…

The Lawnmower Blenny: a Funny, Fascinating Fish of Unpredictable Utility

The lawnmower blenny, aka the jeweled blenny, jeweled rockskipper, or sailfin blenny (Salarias fasciatus), is commonly purchased not just for its comical behavior and only-a-mother-could-love looks, but also for the utilitarian purpose of controlling algae in marine tanks. While you…

Sea Apples: Hazardous Holothurians Best Left to Advanced Hobbyists

In several posts here at Saltwater Smarts, I’ve mentioned that certain marine organisms routinely offered in the aquarium trade should come with a warning label—especially for novice hobbyists. In these cases, I’m usually referring to animals that are really gorgeous…

Don’t Be Bothered by Bristleworms!

In my early days of writing for the marine aquarium hobby, I frequently cautioned fellow hobbyists to be on the lookout for “unwelcome” live rock stowaways, and high on my list of undesirables were the bristleworms. As I saw it…

Gymnomuraena zebra: Another Moray You Just Might Love!

On various occasions, I’ve written about my fondness for the snowflake moray eel (Echidna nebulosa), in one post even going so far as to claim there may be no better eel for the marine aquarium. My biases notwithstanding, I can’t…

How to Prevent Fish from Stealing Coral Food

When it comes to acquiring food, fish will take the path of least resistance. And one of the best ways for a fish to score an easy meal is to snatch morsels away from their glacially slow-moving invertebrate tankmates. Heck,…

Why Kids Shouldn’t Keep Nemo with a Host Anemone

Ask any group of young children to name their favorite saltwater fish, and chances are nearly all of them will reply “the clownfish.” Of course, to most kids, “clownfish” is synonymous with “Nemo,” so the species they have in mind…

5 Maddening Things Marine Fish Do

I love marine fish. I really do. They’ve been part of my life for decades, and observing their beauty and behavior both in the wild and in aquaria seems to fulfill some primal need in me that’s, frankly, impossible to…

Down to One Marine Aquarium—and So Far I’m Loving It!

For quite some time, I had at least two marine aquariums up and running—a 75-gallon reef tank and a 125-gallon FOWLR tank. As regular Saltwater Smarts visitors know, that 75-gallon tank had become something of a thorn in my side.…