Species description

Care, breeding and tankmates

Fish profile

Temperament

Active

They possess an incredibly peaceful, clownish, and inquisitive temperament. They are completely devoid of aggression but their large size and frantic, erratic swimming can sometimes startle more sensitive fish. They often become quite tame, learning to recognize their owners and even accepting food directly from the hand.

Diet

Omnivore

They are omnivorous scavengers that will enthusiastically eat almost anything that reaches the aquarium bottom. A staple diet of high-quality sinking pellets or wafers should be supplemented with fresh vegetables and frozen meaty foods. They are notoriously gluttonous and will happily vacuum up uneaten food left by other fish.

Sex ratio

Group

Sexing is difficult, though mature females are generally plumper and larger than males. They are highly social creatures that enjoy the company of their own kind and should ideally be kept in groups of three or more. They will frequently rest together in comical 'cuddle puddles' on the substrate.

Feeding frequency

Once daily

Feeding them once or twice a day is sufficient, as they spend the rest of their time constantly foraging for leftovers. Because they are so voracious, care must be taken not to overfeed the entire tank just to satiate the loaches. Their enthusiastic feeding behavior can sometimes intimidate more timid bottom-dwellers.

Bioload

Medium

The Dojo Loach, or Weather Loach, is a large, active fish that produces a substantial bioload. Their messy eating habits and large size demand robust filtration to maintain water quality. Frequent gravel vacuuming is necessary to manage the detritus they continuously stir up from the substrate.

Flow

Strong

They are adaptable to various flow rates but generally appreciate moderate water movement that provides high oxygenation. They are known for becoming highly active and swimming frantically when barometric pressure drops, hence the name 'Weather Loach'. Providing air stones or strong surface agitation is highly beneficial.

Jump risk

Yes

Dojo Loaches are notorious escape artists and represent an extremely high jump risk. Their powerful, eel-like bodies allow them to easily wriggle out of tiny gaps or leap out of open tanks. A heavy, tight-fitting lid with all openings securely covered is absolutely mandatory to prevent them from drying out on the floor.

Reproduction

Oviparous

Breeding in the home aquarium is very rare and difficult to trigger intentionally. They are egg scatterers that require specific seasonal changes in temperature and water parameters to induce spawning. In commercial settings, they are often bred using hormone injections.

Compatibility & tankmates

With caution

They are highly peaceful, sociable scavengers that make excellent additions to large community tanks with cooler water. They can be safely kept with goldfish, white cloud mountain minnows, and peaceful barbs. Avoid keeping them with aggressive cichlids or fish small enough to accidentally be swallowed during their frantic feeding frenzies.

Tank level

Bottom

They are predominantly bottom dwellers that spend their time resting on or burrowing into the substrate. A soft sand substrate is absolutely essential, as sharp gravel will severely damage their delicate barbels and scaleless bodies. They will occasionally dart to the surface to take a gulp of atmospheric air.