Drab snake moray
Uropterygius inornatus
The Drab snake moray exhibits a slender, elongated body with a uniform brown coloration and distinctive small, dark speckles.
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About the Drab snake moray
This is a tiny little reef moray that spends most of its time wedged into rock cracks and caves, with just its head poking out. It stays drab tan to brown and is more of a "blink and you miss it" eel, but its whole sneaky crevice-dweller vibe is exactly what makes it fun if you like oddball marine fish.
Quick Facts
Size
19 cm
Temperament
Semi-aggressive
Difficulty
Advanced
Min Tank Size
75 gallons
Lifespan
5-10 years
Origin
Western Indian Ocean; Pacific Ocean (Moluccas, Marshalls, Gilberts, Tonga, Pitcairn, Oeno, Hawaiian Islands)
Diet
Carnivore - small meaty marine foods (shrimp, mysis, finely chopped seafood), offered with tongs
Water Parameters
24-29°C
8.1-8.4
8-12 dGH
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This species needs 24-29°C in a 75 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- This moray needs a tight lid and no gaps around plumbing - they can snake out through stuff you would swear is too small.
- Build a rock maze with snug caves and PVC elbows; if it feels exposed it will hide forever and may stop eating.
- Keep it stable at 76-79F, salinity 1.024-1.026, pH 8.1-8.4, and keep nitrate low (ideally under ~20 ppm) - they sulk fast when the water swings.
- Feed with tongs after lights dim: meaty marine foods like silversides, shrimp, squid, clam, and chunks of fish; start 2-3x/week and adjust so it stays thick but not bloated.
- Always thaw and rinse frozen foods and soak in vitamins once in a while; they can go off food if the diet is too repetitive.
- Tankmates: tough, non-nippy fish that will not fit in its mouth; skip small fish, tiny shrimp/crabs, and anything that likes to pick at eels (some triggers and puffers are trouble).
- Watch for feeding strikes on your fingers and for morays wedging into rockwork; plan escape routes in the scape so it cannot lock itself in and get injured.
Compatibility
Good Tankmates
- Tough, mid-sized wrasses (Halichoeres types like melanurus or yellow coris) - theyre busy, not easy to bully, and usually smart enough to leave the eel alone. Just dont add tiny wrasses that can become a midnight snack.
- Rabbitfish (foxface and friends) - good algae workers, generally chill but not pushovers, and the venomous spines make most tank mates keep it respectful. The moray usually ignores them.
- Tangs in the medium range (yellow, kole, tomini) - fast, confident swimmers that dont hang in the eels face. Theyre usually fine as long as the eel is well fed and has rockwork to claim.
- Dwarf angels (coral beauty, flame, eibli) - lots of attitude but not typically eel-targeting, and they dont sleep on the sand right next to the morays cave if you give plenty of hiding spots.
- Hawkfish (flame or longnose) - perchers that can handle themselves and dont stress the eel out. Keep in mind hawkfish are the bigger threat to small shrimp than the eel is.
- Sturdier dottybacks (like orchid or springeri) - can work if the tank has real rockwork and territories. The eel mostly doesnt care, but avoid the extra psycho dottybacks in cramped setups.
Avoid
- Tiny fish like neon gobies, small firefish, tiny blennies - basically anything that can fit in the morays mouth once lights go out. They may look fine for weeks, then vanish overnight.
- Crustaceans you actually want to keep (cleaner shrimp, peppermint shrimp, small crabs) - drab snake morays are chill until they smell food, then shrimp is just shrimp. Expect losses sooner or later.
- Fin-nippers and rock bullies (some damsels, especially domino and similar) - theyll pick at the eels face and eyes when it sticks out of the cave, and that can spiral into a stressed, bitey eel.
Where they come from
Drab snake morays (Uropterygius inornatus) show up around Indo-Pacific reefs, usually tucked into rubble, tight crevices, and spongey rockwork. They are the definition of "blink and you miss it" in the wild, which explains a lot about how they act in a tank: hide first, ask questions later.
Setting up their tank
Think "secure burrow with water around it" more than "open swim space." Mine spent most daylight hours with just its nose out, and that was a happy moray.
- Tank size: I would not bother under 40 gallons, and 55+ is nicer just for stability (they do not need huge swimming room, but you will appreciate the buffer).
- Rockwork: build a maze of tight holes and tunnels. PVC elbows hidden under rock also work great and are easy to clean.
- Substrate: sand is fine. They do not bulldoze like some eels, but they will wedge and push into gaps.
- Filtration: oversized skimmer and strong biological filtration. These are messy, high-protein feeders.
- Flow: moderate. You want good turnover, but avoid blasting the exact cave they pick as home.
- Lid: a real, tight lid. Cover overflow teeth, cable gaps, and any corner openings. If the head fits, the eel fits.
Escape prevention is not optional with this species. Seal gaps around plumbing and cords, and use mesh or acrylic covers. I have found eels halfway out of tanks that I thought were "covered enough."
Water numbers are the usual reef range: stable salinity around 1.025, temp mid-70s F, and low ammonia/nitrite always. What matters most is stability and oxygen. A stressed moray goes off food fast, and they do not have much patience for swings.
What to feed them
They are ambush predators. In my experience, a drab snake moray will learn the feeding routine quickly, but it may take a couple weeks to fully settle and eat like a pig.
- Best staples: chunks of shrimp, squid, clam, scallop, and marine fish flesh (rotate).
- Occasional treats: live ghost shrimp can kickstart a new arrival, but I do not rely on live long-term.
- Avoid: freshwater feeders (goldfish/rosies). Wrong fats, and it is asking for trouble over time.
- Size: pieces about the size of the eel's mouth width. Too big and they will chew, drop, and foul the tank.
- Schedule: 2-3 times per week for adults. Juveniles can take smaller meals a bit more often.
Use feeding tongs and offer food right at the cave entrance. If you wave food around the tank, you just teach them to hunt tankmates (and you stress everyone out).
I like soaking food in a vitamin supplement once a week. Eels can get nutritional issues if you feed one thing on repeat, especially just shrimp.
How they behave and who they get along with
These are secretive and surprisingly bold once they know you. Mine would stick its head out as soon as the room lights dimmed, and it learned to track the tongs fast. They are not "community fish" though. They are a predator that happens to hide a lot.
- Good tankmates: larger, sturdy fish that do not fit in an eel mouth (tangs, larger angels, big wrasses, rabbitfish).
- Risky: slow, long-finned fish (they can get nipped in a tight cave area), and anything that sleeps in the rockwork.
- Do not keep with: small fish, small shrimp/crabs, and ornamental crustaceans you care about. If it can be swallowed, it will be.
- Other eels: possible in a big tank with lots of separate hides, but watch feeding time and be ready to separate.
Morays are food-motivated. The "it has been fine for months" stories usually end right after one fish gets sick, sleeps in the wrong spot, or the eel has a growth spurt.
Also, they wedge themselves hard into rock. If you ever need to move one, do not yank. Coax it out with a dark container or use a feeding stick to guide it out slowly.
Breeding tips
Breeding this species in home aquariums is basically a lottery ticket. Moray spawning involves a pelagic larval stage (leptocephalus) that drifts and feeds in ways we are not set up to handle. You might see courtship behavior in very large, mature systems, but raising babies is not a realistic project for most of us.
If you ever see two morays circling and rising in the water column at night, that can be spawning behavior in some eel species. Cool to witness, but do not expect survivable fry in a standard reef setup.
Common problems to watch for
- Refusing food: usually new arrival stress, too much light/exposure, or not enough tight hides. Offer food at dusk, and try scentier items like clam.
- Poor water quality after feeding: big chunks left behind rot fast. Feed smaller pieces and remove drops within a few minutes.
- Mouth/nose injuries: from wedging into sharp rock or trying to escape. Smooth the entrance of their favorite holes and avoid jagged rubble piles.
- External parasites (ich/velvet): eels can be sensitive to some medications (especially copper). Treat in a hospital tank and research the exact med before dosing.
- Bites and feeding accidents: they do not have great aim in a frenzy. Keep fingers away, use long tongs, and do not "hand feed."
Do not dose copper in a display and assume the eel will be fine. Many morays react badly. If you need to treat parasites, do it in a separate tank where you can control the approach.
If you give them a secure home, stable saltwater, and meaty foods on a routine, they are actually pretty hardy. Most of the losses I have seen are from escape attempts, starvation during the first few weeks, or people underestimating what they will eat once they settle in.
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