Chingilt

Where they come from

Chingilt (Yirrkala chaselingi) is one of those oddball marine eels that shows up from northern Australia area waters. Think warm, shallow coastal stuff with lots of structure - rock, rubble, crevices, and places to wedge into. They are not a "reef showcase" fish, they are a "you built this tank like a bunker" fish.

Setting up their tank

This is an expert fish because the tank has to be tight, stable, and eel-proof. More than almost anything else, your job is to give it secure hiding spots and make escaping impossible.

• Tank size: bigger is better, but focus on footprint and secure rockwork. I would not bother under 75 gallons, and 100+ makes life easier.
• Rockwork: build caves and long crevices it can back into. Make sure rocks sit on the glass or on a solid base, not on sand it can dig under.
• Substrate: sand is fine, but assume it will rearrange it. Keep heavy structures from depending on the sand for support.
• Lid: full coverage. Block every gap around plumbing, cords, and overflows. If a credit card can fit, an eel can test it.
• Filtration: strong biological filtration and a skimmer that can handle messy feedings. These guys are not delicate, but they punish lazy nutrient control.
• Flow: moderate is usually fine. Give calmer zones near caves so it can sit without getting blasted.
• Parameters: stable salinity and temp matter more than chasing fancy numbers. Keep swings small and your maintenance routine steady.

Lighting does not need to be intense. If you are running reef lights, add extra shaded areas with overhangs or PVC hidden behind rock. A chingilt that feels exposed will go on hunger strikes or only feed after lights out.

What to feed them

They are carnivores and they like meaty foods. Mine did best on a rotation, and I avoided feeding only one thing for months at a time.

• Staples: chunks of shrimp, squid, clam, mussel, marine fish flesh (use sparingly and from good sources).
• Convenient options: quality frozen carnivore blends, chopped seafood mix (rinse if it is super juice-heavy).
• Occasional treats: live ghost shrimp or live saltwater-safe prey if you are trying to start a shy new arrival (do not make it the permanent plan).
• What I skip: freshwater feeder fish. They are a parasite/disease risk and the nutrition profile is not great long term.

Feeding schedule depends on the individual and tank temp, but for most adult eels I stick to 2-3 solid meals per week. Young or thin specimens may need smaller meals more often. Watch the body: you want it filled out behind the head, not pinched.

How they behave and who they get along with

Chingilts act like ambush predators because that is what they are. They are not out hunting constantly, but they will take opportunities. If it fits in the mouth, it is on the menu, especially at night.

• Good tankmates: robust fish that are too large to swallow and not prone to picking at eels (bigger angels, tangs, rabbitfish, larger wrasses).
• Risky tankmates: small fish, ornamental shrimp, crabs, small gobies/blennies, and anything that sleeps on the sand near the eel's hide.
• Tankmates to avoid: aggressive fin-nippers or fish that constantly harass caves (some triggers, some dottybacks). Stress leads to hiding and missed meals.

They can be surprisingly bold at feeding time once they learn the routine. The rest of the time, expect a lot of hiding and occasional repositioning. Keep your hands clear during feeding. They do not mean to tag you, but they are not precise when they strike.

Breeding tips

In home aquariums, breeding Yirrkala species is basically a lottery ticket. Even if you get a pair (good luck sexing them), you are dealing with a marine eel larval stage that is not something most of us can raise. If you ever see courtship behavior, it is still worth logging water conditions and seasons just for your own records, but I would not set up around breeding as a goal.

Common problems to watch for

• Escapes: number one killer. Lids shift, mesh warps, you forget a feeding door. Check gaps weekly.
• Refusing food: often stress from too much light, not enough cover, bullying tankmates, or a new environment. Offer food at dusk, use tongs, and keep foot traffic down near the tank for a few days.
• Poor water after heavy feeding: leftover chunks in rockwork spike nutrients fast. Feed targeted portions and remove misses.
• Injuries from rockwork: sharp edges and unstable stacks cause scrapes. Smooth out sharp points and make sure caves cannot collapse.
• Parasites and infections: wild-caught eels can come in with baggage. Quarantine is tough with escape artists, but if you can do a covered QT with PVC hides, do it. At minimum, observe closely for excess mucus, rapid breathing, and cloudy eyes.
• Copper sensitivity concerns: many eel-type fish do not handle copper well. If you are treating disease, research the medication and dosage carefully and lean on non-copper options where possible.

If you treat them like a pet predator with a strong need for security, they are actually pretty hardy. Most failures I have seen were not mysterious - they were gaps in the lid, unstable rock piles, or feeding mess left to rot.