Sharpnose wrasse
Wetmorella nigropinnata
Also known as: Black-spot pigmy wrasse, Blackspot pigmy wrasse, Possum wrasse, Pygmy possum wrasse, White-banded possum-wrasse, Yellow-banded possum wrasse, Yellow-banded possum-wrasse
This is one of those tiny, sneaky reef wrasses that lives in the rockwork - you'll see it poking its little sharp snout into cracks hunting micro-prey. Super peaceful and shy, but once it settles in, its yellow bars and twitchy 'possum wrasse' vibes are seriously addictive to watch.
Sharpnose wrasse features a slender body with distinctive sharp, pointed jaws and a vibrant blue-green coloration often highlighted by darker markings.
This page includes AI-generated images. Why am I seeing AI images?
Quick Facts
Size
8 cm
Temperament
Peaceful
Difficulty
Intermediate
Min Tank Size
15 gallons
Lifespan
3-6 years
Origin
Indo-Pacific
Diet
Carnivore - small meaty foods (mysis, brine, copepods/amphipods), feeds on benthic invertebrates
Care Notes
- Give it lots of rockwork with caves and overhangs - they spend the day ducking in and out and will sulk in a bare tank.
- Keep salinity steady around 1.025-1.026, temp 76-79F, and keep nitrate low-ish (try under ~10-20 ppm) or they get skittish and stop cruising for food.
- They are jumpers when spooked, especially after lights out - use a tight lid or mesh screen and cover any gaps.
- Feed small meaty stuff 2-3 times a day: mysis, enriched brine, copepods, finely chopped shrimp, and good frozen blends; they do way better with frequent small meals than one big dump.
- If your tank is low on pods, plan on supplemental feeding from day one because they naturally pick all day and can look 'fine' while slowly thinning out.
- Good with peaceful reef fish (gobies, blennies, clowns, small tangs), but skip housing with big bullies or fast aggressive eaters that outcompete it at feeding time.
- Watch out for aggressive wrasses and dottybacks - they can keep a sharpnose pinned in hiding, and then it quietly starves.
- Breeding is not really a home-aquarium thing; you might see quick dusk display behavior, but raising larvae is the hard part, so just treat any spawning as a fun bonus.
Compatibility
Good Tankmates
- Small, peaceful gobies (clown goby, neon goby, watchman goby) - they mostly mind their own business and the sharpnose wrasse just cruises the rockwork hunting pods
- Blennies with a chill attitude (tailspot, bicolor, lawnmower) - good perching buddies, and they usually do not hassle a Wetmorella
- Peaceful clownfish pairs (ocellaris or percula) - as long as the clowns are not total jerks about their anemone zone, they coexist fine
- Firefish and dartfish (Nemateleotris) - gentle fish that like calmer tanks, and the sharpnose wrasse is usually polite with them in my experience
- Small reef-safe cardinals (Banggai, pajama) - steady, non-competitive feeders that do not pick on a shy wrasse
- Reef-safe fairy and flasher wrasses (smaller Cirrhilabrus and Paracheilinus) - different vibe, lots of open-water swimming, and they typically do not bother a sharpnose
Avoid
- Dottybacks (especially orchid and springeri) - they can get territorial in the rock and will run a sharpnose wrasse into hiding
- Hawkfish (flame, longnose) - not always, but enough times they act like little predators and harass smaller wrasses and gobies that I do not risk it
- Aggressive damsels (domino, three-stripe, big mean Chromis types) - constant chasing and stress, and the sharpnose is not built for that life
- Big, pushy wrasses and bruisers (sixline, melanurus, some Halichoeres) - they outcompete at feeding and can straight-up bully a Wetmorella
Where they come from
Sharpnose wrasses (Wetmorella nigropinnata) come from Indo-Pacific reefs, usually tucked into rocky crevices and rubble zones. You rarely see them cruising out in the open like a fairy wrasse. They are more of a peek-out-from-the-rockwork kind of fish, and that tells you a lot about how to set them up.
Setting up their tank
If you give this wrasse one thing, make it a busy rockscape with holes, overhangs, and little tunnels. Mine spent the first couple weeks doing short laps from one hidey-hole to the next, and it settled in way faster in a tank with lots of cover.
Tank size does not have to be huge, but the layout matters more than gallons. A smaller tank that is packed with live rock and calm tankmates beats a big, bare display where they feel exposed.
- Rockwork: lots of cracks and caves, plus a few shaded areas
- Flow: moderate, with calmer pockets around the rock (they like to hover and pick)
- Lighting: anything reef-normal is fine, but they appreciate shaded zones
- Cover: use a lid or mesh top - they can jump when spooked
- Sandbed: not mandatory for sleeping like some wrasses, but a natural sandbed helps the whole micro-food web
If your sharpnose disappears for a day or two after you add it, do not panic. They can wedge themselves deep in the rock and only come out once they learn the room is safe.
Avoid throwing them into a tank with very boisterous fish right away (big clowns, pushy dottybacks, established damsels). They are not built for constant face-to-face drama.
What to feed them
These guys are little micropredators. In the wild they pick tiny crustaceans off rock and coral all day. In a tank, the biggest challenge is getting a new one eating confidently, especially if it came in skinny.
Once they recognize frozen food as food, they are usually pretty easy. The key is small particle size and feeding more than once a day if you can. A sharpnose that only gets one big meal often stays shy and thin.
- Go-to foods: frozen mysis (smaller pieces), brine shrimp (better as a starter), calanus, finely chopped krill
- Best starters for picky new fish: live copepods, live baby brine, blackworms (if you can get them clean)
- Prepared foods: small sinking pellets can work once they are settled, but do not rely on pellets at first
- Feeding style: target feed near their favorite rockwork so the food drifts past their hiding spots
If it ignores food in the water column, try turning flow down for 5 minutes and squirting a little cloud of food right into the rockwork. They often prefer to hunt in and around the rocks rather than chase food in open water.
How they behave and who they get along with
Sharpnose wrasses are generally peaceful and a little secretive. They will get bolder over time, but even a confident one still does the stop-and-peek thing. Think of them like a reef goby with wrasse energy.
They are usually reef-safe with corals, but they are hunters. Tiny ornamental shrimp and other bite-sized cleanup crew can be on the menu, especially if the wrasse is underfed or the shrimp is very small.
- Good tankmates: small peaceful fish (gobies, blennies, firefish), most fairy and flasher wrasses, calm tangs in larger tanks
- Use caution with: dottybacks, hawkfish, aggressive clowns, large damsels, big wrasses that dominate feeding time
- Inverts: usually fine with snails and larger hermits; watch tiny shrimp (sexy shrimp, small peppermint juveniles) and very small crabs
They are not sand sleepers like many Halichoeres wrasses, so you are not trying to cater to that behavior. They prefer to wedge into rock and feel hidden.
Breeding tips
Breeding sharpnose wrasses at home is not something most hobbyists pull off. They are small, shy, and likely pelagic spawners with larvae that need specialized plankton culture. You might see courtship behavior in a peaceful, mature reef, but raising babies is the hard part.
If you ever want to try, your best shot is a species-focused setup with very stable water, lots of live foods, and the ability to run live phyto and rotifers daily. Realistically though, most of us just enjoy them as a display fish and leave breeding to the specialists.
Common problems to watch for
The main issues I see with sharpnose wrasses are shipping stress, refusing food early on, and getting bullied into hiding. They are hardy once settled, but the first month is where you either win them over or lose them.
- Not eating: usually a new-fish problem - offer live pods or live baby brine and feed small amounts more often
- Getting outcompeted: they are slow, careful feeders - target feed and avoid keeping them with pigs at feeding time
- Jumping: especially during the first week or after a tank scare - keep a lid/mesh top
- Parasites: watch for flashing, heavy breathing, or fine white spots - wrasses can be sensitive, so have a plan for quarantine and treatment
- Slow weight loss: can happen in sterile tanks with little micro-life - supplement with pods and feed more frequently
A sharpnose that stays hidden 24/7 and looks pinched behind the head is usually losing the food battle. Do not just wait it out. Step in with smaller foods, more feedings, and less competition.
If you can, quarantine them in a tank with a few pieces of live rock or PVC plus some seeded media. Bare, bright quarantine tanks can make them shut down. Give them a place to wedge into and they calm down fast.
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.
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.
Chinese zebra goby
Ptereleotris zebra
Ptereleotris zebra is one of those slick, torpedo-shaped dartfish that likes to hover in the water column, then instantly zip back into a bolt-hole when it gets spooked. In the wild it hangs out on exposed seaward reefs in groups, often in current, and in a tank the big thing is giving it open swim room plus tight cover because it is absolutely a jumper.
Diamond Watchman Goby
Valenciennea puellaris
This is that sand-sifting goby you'll see cruising the bottom, taking huge mouthfuls of sand and spitting it out like a little construction crew. It's awesome for keeping a sandy substrate looking clean, but it'll also redecorate-so anything sitting on the sand is gonna get buried or undermined sooner or later. Super cool personality too, especially once it picks a favorite burrow and starts "working" all day.
Exquisite wrasse
Cirrhilabrus exquisitus
This is one of those fairy wrasses that looks like it was painted with highlighters - males can shift through greens, reds, blues, and purples depending on mood and whether they are showing off. In a reef tank its usually out and cruising the water column, grabbing tiny meaty foods, and doing little display flare-ups at its own reflection or other wrasses. Biggest real-world gotcha is they are jumpers, so a tight lid or mesh top is basically mandatory.
More to Explore
Discover more marine species.
Blackspotted snake eel
Quassiremus ascensionis
This is a sand-burying snake eel from the tropical Atlantic that likes to sit with just its head poking out, waiting for food. It gets pretty big (around 70 cm) and needs a real marine setup with a deep, soft sand bed and a tight lid because eels are escape artists.
Blue Green Chromis (Green Chromis)
Chromis viridis
Blue Green Chromis are those shimmery little green-blue darts you'll see zipping around the top of a reef tank, always looking like they're catching the light just right. They're super fun in a group because they hover and cruise together, but they've got a bit of a "pecking order" thing going on if the tank's tight or the group's too small.
Broadbarred firefish
Pterois antennata
This is the lionfish with the long "antennae" (those banded tentacles above the eyes) and the ragged, spotty fins that make it look extra dramatic under reef lighting. It'll spend the day tucked under ledges and then cruise out at dusk to ambush shrimp, crabs, and any small fish it can fit in its mouth-also worth remembering it's venomous, so you treat it with respect when you're in the tank.
Comet
Calloplesiops altivelis
This is the famous "Marine Betta" look-alike: jet-dark with those starry spots, and that wild fake eye near the back that makes predators bite the wrong end. It's a super shy cave-dweller by day and then turns into a sneaky night hunter, cruising out for crustaceans and small fish.
Coral Beauty Angelfish
Centropyge bispinosa
Coral Beauty is that classic little dwarf angel with the purple-blue body and orange striping that looks different from fish to fish. It spends a lot of the day weaving through rockwork and picking at algae and other bits, so a tank with mature live rock really brings out its best behavior. It can be a little bossy (especially with other dwarf angels) and some individuals will nip corals, so it is reef-safe with caution.
Firefish (Fire Goby / Fire Dartfish)
Nemateleotris magnifica
This is that little "hover-and-dart" reef fish with the yellow face and the white-to-red fade that looks like it was airbrushed on. It'll pick a bolt-hole in the rockwork, hang in the water column facing the current, and do that cute little flag-flick with the tall first dorsal fin when it's feeling bold.
Looking for other species?