Snoutscale Whiptail

Where they come from

Snoutscale whiptails are deep-slope grenadiers from the Indo-Pacific, living over soft mud and silt on the continental slope. Think cold, dark water a few hundred meters down, slow currents, and very little light. Most that show up in captivity are accidental bycatch.

Setting up their tank

You are trying to mimic a cold, dim, low-energy slope. Size and stability matter more than anything.

• Tank size: 400+ gallons with a long footprint (6 ft or more). They cruise, not dart.
• Temperature: 4-8 C (39-46 F), stable. Use a serious chiller with redundancy and a controller. Insulate lines.
• Lighting: very dim. Blue or red night lighting only for viewing. Black out three sides.
• Flow: gentle, steady current along the bottom. Avoid blasting powerheads. Think slow laminar flow.
• Oxygen: high and stable. Big skimmer, strong aeration, and surface agitation. Add battery backup for pumps.
• Filtration: oversized skimmer, large sump, and UV. Cold systems are slower to process waste, so go big.
• Substrate: 5-8 cm of fine sand mixed with silt. No sharp grains. They probe and rest on it.
• Aquascape: mostly open with low mounds and trenches. They prefer open mud flats over rock piles.
• Lids and noise: tight lid (they can spook), and a quiet room. Vibration stresses deepwater fish.
• Quarantine: chilled QT only. Room-temp QT will kill them. Match temp, salinity, and very low light.

What to feed them

They are slow, bottom-feeding scavengers that pick at small invertebrates. Forget flakes and pellets. Offer small, soft, sinking foods and keep portions modest so you do not foul the tank.

• Chopped marine shrimp, clam, mussel, scallop, and squid mantle
• Mysis, krill, Calanus, and other small crustaceans (frozen, well-rinsed)
• Live or fresh options if available: marine amphipods, small worms
• Soak foods in a vitamin HUFA supplement once or twice a week

Target-feed with a feeding tube or long tongs right onto the substrate. Bury tiny pieces slightly in the sand to trigger that foraging response. Feed after lights out or under dim red light.

How they behave and who they get along with

Expect a calm, deliberate cruiser that hovers just off the bottom or rests on the sand. They spook with sudden light or noise, but settle in quiet, dim setups. Not aggressive, but they will swallow bite-sized crustaceans.

• Good tankmates: other chilled, deepwater, slow species that ignore food on the bottom (eelpouts, snailfish, some deepwater sculpins).
• Questionable: anything fast or boisterous that will outcompete them for food.
• Avoid: groupers, large wrasses, and active pelagic predators. Also avoid warmwater species entirely.
• Not reef safe: they will eat small shrimp and worms, and typical corals will not tolerate the cold anyway.

Breeding tips

Nothing credible from home aquaria. These are deepwater broadcast spawners with pelagic eggs and larvae drifting in cold, dark water. Without pressure changes, seasonal cues, and room for larval rearing at low temperatures, this is out of reach for hobby setups. Public aquariums have not reported success either.

Common problems to watch for

• Collection damage and barotrauma: inflated abdomen, bulging eyes, inability to stay upright. Survival is often poor. Gentle, near-dark conditions are your best shot.
• Heat stress: anything over 10 C (50 F) for long and they go off food, breathe fast, and fade. Check chiller capacity and probe placement.
• Low oxygen: even in cold water, a pump failure can crash O2 fast. Run redundant air and keep a battery backup.
• Refusing food: switch to smaller, smellier items (clam, scallop), try feeding after midnight, and reduce light to near-dark. Deliver food right to the snout.
• Skin and fin abrasion: rough substrates and rock ledges scrape easily. Use soft sand and rounded rock at most.
• Gas bubble issues from supersaturation: chilled water can hold excess gas if your setup is plumbed poorly. Degas in the sump and avoid microbubble storms.
• Bacterial/fungal lesions: stress plus cold slows healing. Keep water pristine, minimize handling, and be cautious with meds at low temps.
• Noise and vibration stress: skittish behavior, darting, refusal to feed. Put the tank in a quiet room and pad pump mounts.