Cameroon goby

Where they come from

Cameroon gobies (Wheelerigobius wirtzi) come from the eastern Atlantic around Cameroon and nearby areas. They are a small, bottom-hugging goby that spends its life close to rockwork, rubble, and sand, picking at tiny foods and ducking into crevices. Think "shy micro-predator" more than "busy algae grazer."

Setting up their tank

Give them a mature marine tank with lots of rock and little bolt-holes. Mine spent the first week basically living under one ledge, then slowly started coming out once it learned feeding time meant food would land nearby.

A sandy bottom helps because they like to rest on it and sift a little, but the real key is structure: caves, overhangs, and tight cracks they can claim. If they cannot "own" a spot, they stay stressed and skittish.

• Tank maturity: 6+ months is my comfort zone for these
• Aquascape: rockwork with shaded crevices and small caves near the sand
• Substrate: sand or fine rubble works; avoid sharp, chunky gravel
• Flow: moderate is fine, but leave a couple calmer pockets near the bottom
• Lighting: they do not need dim, but they appreciate shaded areas

What to feed them

These are meaty-food fish. If you buy one that is already eating frozen, your odds go way up. If it is not, you may be doing the live-food dance for a bit.

I have the best results feeding small portions more often, and making sure food actually reaches the bottom near their hideout. In a mixed reef, faster fish can steal everything before the goby even commits to leaving its crack.

• Frozen: mysis (smaller pieces), finely chopped shrimp, fish eggs/roe, enriched brine (as a treat)
• Live (for starters or picky individuals): live brine, copepods, small live mysids if you can source them
• Prepared: some will take tiny sinking pellets once settled, but do not count on it at first

How they behave and who they get along with

Cameroon gobies are shy and territorial in a small radius. They are not "community bottom fish" in the way a lot of people expect. They usually ignore fish in the upper water column, but they can be spicy with other bottom sitters that get too close.

In my tanks, the biggest issue was not outright aggression, it was competition. If you keep them with bold eaters, the goby loses the food race and slowly wastes away even though you swear you are feeding enough.

• Good tankmates: calm small fish that do not live on the bottom (small cardinals, small chromis, gentle wrasses), peaceful inverts
• Use caution: other gobies, blennies, dottybacks, hawkfish, and anything that perches and guards territory
• Avoid: aggressive rock-dwellers, big shrimp that harass fish, predators that can gulp a small goby

Breeding tips

Breeding is possible, but it is not a casual "oops babies" fish for most hobbyists. If you get a compatible pair, they will often use a cave and lay eggs on the ceiling or back wall. The male typically guards and fans the clutch.

Raising the larvae is the hard part. Like many marine gobies, the fry are tiny and planktonic. You will need a separate larval setup and a steady supply of the right live foods.

• Give them caves: short pieces of small PVC, snail shells, or tight rock caves where they feel secure
• Feed heavy with quality foods leading up to spawning (small, meaty frozen and live)
• Plan for larvae: rotifers first, then transition to copepods/Artemia as they grow (depending on larval size)
• Dim, gentle aeration in the larval tank helps keep food suspended without beating up the fry

Common problems to watch for

The number one failure mode I see with these is slow starvation. The fish looks fine for a couple weeks, hides a lot, and then you realize it is getting pinched behind the head and losing belly fullness. By the time it is obvious, you are already behind.

• Not eating at the store or during the first week at home
• Food competition from faster tankmates
• Jumping (especially during the first few days)
• Stress from lack of hiding spots or from another bottom-dweller claiming the same real estate
• Parasites common to wild marine fish (watch for rapid breathing, flashing, excess mucus, frayed fins)