Fish & Invertebrates

If you are shopping for one, our current clams and scallops are listed with the size and the light level each one was grown under, so you can match the animal to the tank you already have rather than guessing. A healthy Tridacna clam will outlast most of the equipment in your tank. Get the…

A beginner-friendly guide to the sponges that appear in reef tanks — what they are, why they show up, what they do, and how to tell the harmless ones from the one you should remove.

Which marine fish eat coral, which eat your clean-up crew, and how to tell fish damage from pests. An honest guide to what “reef safe with caution” really means.

How many snails, hermits and shrimp your reef tank needs, and when to replace them.

What to feed anthias, tangs, angelfish, mandarins, wrasses, and clownfish — how much, how often, and why overfeeding is the quiet killer of reef tanks.

Copepods are the part of a reef tank’s ecosystem that’s easy to overlook because most of the action happens overnight, in the sand, and inside the rockwork. But a thriving pod population is quietly doing two jobs at once — cleaning up detritus and moving nutrition from the bottom of the food chain all the…

Skip the guesswork. Our Clean Up Crew Calculator takes your tank size and what the algae is actually doing, then builds the crew from what is in our systems today with live prices. If the right answer is to buy nothing yet, it says that too. A reef tank without a clean-up crew is a…

Overstocking is the single most common mistake in the hobby, and it’s rarely intentional — it happens one “just one more fish” at a time. How many fish a tank can actually support depends on more than gallons: bioload, adult size, temperament, and how much swimming room a species needs all matter more than a…