Cameroon goby
Wheelerigobius wirtzi
The Cameroon goby exhibits a slender body with a mottled pattern of brown and yellow, featuring elongated dorsal and anal fins.
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About the Cameroon goby
This is a tiny little marine goby from the Gulf of Guinea that hangs out shallow on rocky faces. Its whole vibe is "small, shy, and clingy to cover," so it does best when you give it lots of rockwork and calm tankmates. Not something you see in shops often, but its micro-goby size and habitat style make it a really interesting oddball.
Also known as
Quick Facts
Size
3.5 cm SL
Temperament
Peaceful
Difficulty
Advanced
Min Tank Size
22 gallons
Lifespan
3-5 years
Origin
West Africa (eastern Atlantic - Gulf of Guinea: Cameroon and Sao Tome)
Diet
Carnivore - small meaty foods (tiny crustaceans; copepods, mysis, enriched brine)
Water Parameters
26-28°C
7.5-8.5
8-12 dGH
Need a heater for this species?
This species needs 26-28°C in a 22 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- Give it a mature reef tank with lots of rock crevices and a couple of tight caves - they want a bolt-hole they can fully disappear into when spooked.
- Keep salinity stable around 1.025-1.026 and temp 24-26 C (75-79 F); they do way worse with swingy salinity/pH than with being a half-degree off.
- They are micro-predators, so plan on meaty small foods: enriched mysis, chopped shrimp, clam, and quality pellets if you can wean them - start with frozen and mix in pellets slowly.
- Feed small amounts 1-2 times a day and watch that the goby actually gets food; in busy tanks they can get outcompeted and slowly waste away without you noticing.
- Tankmates: peaceful reef fish are fine (small wrasses, cardinals, blennies), but skip aggressive dottybacks, big hawkfish, and pushy damsels that will hog caves and harass it.
- Expect some territorial squabbles with other bottom-dwellers and similar gobies; if you want a pair, add them together and provide multiple caves so one fish is not constantly evicted.
- Common headaches are shipping stress and parasites; quarantine if you can, and if it starts breathing hard or flashing, do not just 'wait it out' - treat early because they can crash fast.
Compatibility
Good Tankmates
- Other small, peaceful gobies (think neon gobies, clown gobies, watchman-type gobies) - they mostly ignore each other as long as you have a few hiding spots and not just one prime cave
- Small, calm blennies like tailspot blennies - different vibe and different hangout zones, and they are not usually pushy with gobies
- Peaceful clowns (ocellaris/percula) - they do their own thing in the water column and tend to leave a Cameroon goby alone
- Chill small wrasses like a possum wrasse - active but not a bully, and they do not usually hassle tiny bottom perchers
- Firefish (dartfish) - same peaceful temperament, just make sure the tank is covered since firefish are jumpers
- Cardinals (banggai or pajama) - slow, mellow, and not interested in picking on a little goby that just wants to perch and scoot around
Avoid
- Dottybacks (like royal dottybacks) - they can be little terrors and will absolutely claim a rock pile and chase a goby off the bottom
- Hawkfish - even when they are not being outright mean, they are opportunistic and a small goby can look like a snack or a punching bag
- Big or bossy wrasses (six-line, melanurus, etc.) - too much attitude and constant patrolling, and they can stress a peaceful goby into hiding
- Aggressive damsels (most common blue/black damsels) - they love to 'own' the rockwork and will bully a calm bottom sitter nonstop
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."
This is one of those gobies that does fine only when your tank is already stable. If the tank is still going through ugly phases or parameter swings, they tend to fade fast.
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
Cover the tank. Gobies are notorious jumpers, and shy species will launch when spooked. A mesh lid has saved me more than once.
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
Target feeding helps a lot. Use a pipette/turkey baster to puff food right at the entrance of its favorite cave. After a couple weeks, many start meeting you halfway.
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
Tiny ornamental shrimp can become snacks. Not always, but do not be shocked if a small goby decides a baby shrimp is food.
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
If you see a male glued to a cave and refusing food, do not panic right away. He may be guarding eggs. Keep feedings small and keep hands out of the tank.
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)
If it is not eating within a few days, act fast: try live foods, reduce competition (feed other fish at the opposite end first), and get food to the bottom right at its hide. Waiting a week usually ends badly.
Take a quick phone photo of the goby once a week from the same angle. It sounds silly, but it makes weight loss obvious before it becomes an emergency.
Similar Species
Other marine peaceful species you might be interested in.
Banggai Cardinalfish
Pterapogon kauderni
Banggai cardinals just sort of hover like little underwater satellites, and the bold black bars with those long, polka-dotted fins look unreal under reef lighting. They're super chill most of the time, but once a pair forms you'll see real "fish drama," and the male will even mouthbrood the babies like a champ.
Blackbreast cardinalfish
Xeniamia atrithorax
This is a tiny deepwater cardinalfish that was only described in 2016, and it stays around 3 cm long max. The cool calling-card is the dark "blackbreast" patch on the chest area and the fact that the males mouthbrood eggs like other cardinalfish, even though it comes from way deeper water than the usual reef tank cardinals.
Blackfin slatey
Diagramma melanacrum
This is a big Indo-West Pacific sweetlips/grunt that cruises reefs and hangs in caves, and it gets that cool yellow-and-silver look sprinkled with dark spots plus the really obvious black on the lower tail and the pelvic/anal fins. Juveniles show up in murkier estuary and silty reef areas, then the adults shift deeper and often sit in small groups until they go hunting at night. In aquariums its size is the whole story - it is a public-aquarium kind of fish once grown.
Blackspot razorfish
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This is one of the coolest "knife-bodied" wrasses - it hangs over open sand and, when it gets spooked or wants to sleep, it literally torpedoes straight into the sand. Give it a deep, fine sand bed and it will act totally different (and way more natural) than a typical rock-hugging reef wrasse. Adults are usually shy and cruisy with tankmates, but they are not forgiving about rough handling or sketchy setups.
Blueband goby
Valenciennea strigata
This is that classic gold/yellow-headed sand-sifting goby with the little blue cheek stripe-always busy, always rearranging your sandbed. In a reef tank it'll spend the day taking mouthfuls of sand, filtering out tiny critters/foods, then "snowing" clean sand back out, and it'll usually claim a burrow area (often as a pair in the wild). It's super cool behavior-wise, but you really do need a mature tank with a proper sandbed and a lid because they can jump.
Bristletail Filefish (Aiptasia-Eating Filefish)
Acreichthys tomentosus
This little weirdo is one of my favorites because it's got that goofy filefish "face," a knack for wedging itself into rockwork, and a ton of personality once it settles in. People love them for the chance they'll snack on nuisance Aiptasia, but even when they're not on pest patrol they're just fun to watch cruise around and pick at stuff all day.
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Bluespotted dottyback
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