Life After Purchase: A Guide to Introducing New Fish to Your Aquarium’s Social Dynamics

Moving can be tough on a kid. New places, new school, making new friends, meeting new bullies . . . I’m sure some of you can relate. So can your fish. Life can be tough even after getting shipped halfway around the world. So how can we, as responsible aquarists, help them out? The answer … [Read More]

Don’t Overestimate Piscine Individualism!

LFS staffer to customer eyeing sohal tang as potential purchase: “Hmm, I don’t think that fish would be a good choice for your tank. It can get very aggressive, and most of the fish you have in there now are pretty shy and passive. Customer to staffer: “Yeah, I know sohals have a reputation for … [Read More]

The Rockmover Wrasse: What a Difference Adulthood Can Make!

In a previous post titled “Marine Fish Bait and Switch—5 Adorable Juveniles that Blossom into Brutes,” I listed the rockmover wrasse (Novaculichthys taeniourus), aka the reindeer wrasse or the dragon wrasse, among four other species that are typically sold in the marine aquarium trade as cute little youngsters but mature into very different adults. However, … [Read More]

When Should Squabbling Marine Fish Be Separated?

I recently introduced a Kole tang to my tank, and it keeps getting in fights with the resident yellow tang. So far, neither one has been seriously hurt, but I’m worried about where this is heading. Do I need to separate these two, or will they eventually chill out and coexist peacefully?” Over the years, … [Read More]

Why Territoriality is a Major Issue in Marine Tanks

One of the more challenging aspects of marine fishkeeping, particularly for those interested in creating a mixed community of interesting fishes, is choosing different species that will coexist peacefully in captivity. This might seem easy enough given the fact that, in the wild, so many different species can often be found sharing the same patch … [Read More]