Freshwater Fish

Bamboo Shrimp

Atyopsis moluccensis

Fan-handed filter feeder that fishes the current · Intermediate

Lifespan: 1-2 years is typical; up to 5 when well fed, but many starve sooner
Adult size: 6-9cm (to ~3in); males larger, with a thickened, elongated front pair of legs
Min. habitat: 20 gallon long / 75L minimum, mature tank with strong flow
Social needs: Fine alone; peaceful in groups of 3+
Diet: Filter feeder — fine particle foods dosed into the current
Time: Normal tank care plus targeted feeding several times a week
Cost: Low-medium

Overview

The bamboo shrimp is the freshwater hobby's specialist filter feeder: instead of claws, its front limbs end in four feathery fans that it spreads into the current to net passing food particles.
At 6-9cm (up to around 3 inches) it dwarfs the cherry and Amano shrimp elsewhere on this site, wearing warm amber-brown with a pale cream racing stripe down its back.

That fan-feeding lifestyle is the entire care puzzle.
It cannot graze algae the way other shrimp do, so it thrives only in a mature tank with genuine water movement and enough suspended food, which is why an animal routinely sold as easy earns an Intermediate rating here.

Almost every bamboo shrimp in the trade is wild-caught in Southeast Asia, because its larvae need brackish water to develop and it has never been bred at scale in home tanks.
That makes careful sourcing and gentle acclimation part of keeping this species responsibly.

Plan on a 20 gallon long (75 litres) as a working minimum, and only a tank that has been running for several months; a freshly cycled aquarium is too clean to feed a filter feeder.
Place wood or rock perches directly in the outflow of the filter or a small powerhead, because the shrimp will climb to the fastest water it can find and face into the stream.

Keep the water at 72-82F (22-28C), pH 6.5-7.5, with moderate to firm hardness and ammonia and nitrite at zero.
It needs enough dissolved minerals (GH and KH) to build each new shell, so do not run it in soft, near-RO water.
Like all invertebrates it has no tolerance for copper in medications or fertilisers.
Fit a tight lid, since a hungry or stressed bamboo shrimp is a determined climber.

Provide dense plants or caves for moulting, because it hides for several days after each moult while its new shell hardens.
If there is no strong flow anywhere in the tank, this is the wrong species for that tank.

A bamboo shrimp eats by holding its fans open in the current and combing off whatever they trap, so its food must be suspended in the water column, not sitting on the glass.
In most home aquariums the natural supply of micro-particles is not enough, so target-feed several times a week: powdered spirulina, finely crushed flake, golden pearls, or baby brine shrimp released upstream so the cloud drifts through the fans.

Read the behaviour like a gauge.
A shrimp perched high with fans spread is feeding well, while one crouched low and sweeping the substrate with its fans is starving, and slow starvation is the single most common way keepers lose this species.

A spotless, heavily over-filtered tank works against it, so aim for a mature system with some biofilm and mulm rather than surgical cleanliness.
Never move it to a bare quarantine-style tank long term, because there is nothing there for it to eat.

Most losses happen in the first few weeks, because wild-caught stock arrives stressed and half-starved from the supply chain.
Drip acclimate over at least an hour, and in the shop choose an animal that is actively fanning rather than one crouched low and picking listlessly at the gravel.

It moults every month or two and then disappears into cover for days, which is normal, not illness.
Leave the shed shell in the tank, since the shrimp eats it to recover minerals, and trace failed or stuck moults to unstable parameters or mineral-poor water.

Colour shifts from deep brick red to muddy brown are normal and track mood, moulting, and background, so do not read them as disease on their own.
Check every medication and plant fertiliser for copper before it goes anywhere near the tank, and with steady feeding expect 1-2 years at least, and up to 5 from a well-kept adult.

The bamboo shrimp is entirely peaceful and physically incapable of harming a tankmate, because its fans cannot pinch anything.
It is safe with plants, snails, dwarf shrimp, and any small, gentle community fish.

It is content kept alone, and a group of three or more will simply line up along the same flow line without any squabbling.
The danger runs the other way: large cichlids, goldfish, crayfish, and nippy barbs treat a slow, defenceless shrimp of this size as a target.

Expect a mostly sedentary animal that claims one high-flow perch and occupies it for weeks, becoming more active toward dusk.
The reward is not antics but the quiet spectacle of a living net fishing the current every day.