Kissing Loach Yasuhikotakia Care Guide: Thai Wild
The dwarf chain loach is one of the great conservation success stories in the aquarium hobby — extinct in the wild but kept alive entirely through captive breeding programmes that now supply every fish in the trade. Kissing loach yasuhikotakia sidthimunki is a 5 cm peaceful schooling loach with a striking dark chain-link pattern along the silver body, originally from western Thailand near Kanchanaburi. The kissing loach yasuhikotakia survives in the hobby today only because dedicated breeders maintained captive populations through hormone-induced spawning. This guide from Gensou Aquascaping at 5 Everton Park covers proper husbandry for an ethically sourced CB species.
Conservation Background
Once abundant in the Mae Klong river drainage of western Thailand, wild populations crashed in the 1980s due to dam construction and ornamental trade collection. The species is now classified as critically endangered, possibly extinct in the wild — surveys since 2000 have failed to confirm wild specimens. All trade stock comes from European and Thai captive breeding facilities using hormone induction.
Tank Size
A school of six to eight settles into 90 litres. Larger groups of 10-15 in 150 litres show best behaviour. Length matters — 80-100 cm tank length suits the active midwater swimming style. Single specimens or pairs become reclusive and aggressive; always keep in proper schools.
Aquascape
Build a heavily planted SE Asian community scape with fine sand substrate, multiple driftwood structures providing caves and overhangs, leaf litter, and shade-tolerant plants — Cryptocoryne species, Java fern, Anubias attached to wood. Floating frogbit dims the surface and reduces stress.
Water Parameters
Target pH 6.0-7.5, GH 2-10, KH 1-6, temperature 24-28°C. CB stock from European farms tolerates a wide parameter window — Singapore PUB tap with chloramine neutralised works directly. Stable parameters matter more than chasing extreme blackwater chemistry.
Filtration
Moderate to strong flow appropriate to river origin. A small to medium canister or quality HOB on a 90-150 litre tank delivers appropriate current. The aquarium filtration range includes options sized for medium planted communities.
Feeding
Omnivorous with a snail-eating preference. Quality micro-pellet, sinking pellet, frozen bloodworm, frozen daphnia, live blackworm and the occasional live snail (pond snails are accepted enthusiastically) form the staple. Sidthimunki are excellent at controlling pest snail populations in planted tanks. The community fish food range includes appropriate sinking pellet options.
Schooling Behaviour
Strongly social — groups of six minimum. In proper schools, dwarf chain loaches display constant low-level chasing within the group with no real aggression. Single fish or pairs show stress colouration, hide constantly, and may become aggressive toward tank mates as displacement behaviour.
Tank Mates
Highly compatible. Pair with peaceful tetras, rasboras, gouramis (avoid Botias which can be aggressive), Corydoras, and small to medium peaceful community fish. Avoid very small shrimp — sidthimunki may predate dwarf cherry shrimp under 1 cm. Larger Amano shrimp are usually safe.
Breeding
Hobbyist breeding is essentially impossible without hormone induction equipment. All commercial breeding occurs at specialised facilities. This is fine — the species exists in the trade only because of ongoing CB programmes, and supporting CB stock supports the conservation mechanism.
Singapore Sourcing
Captive-bred dwarf chain loaches from European farms come into Polyart, C328 and Iwarna at SGD 12-25 per fish. Buy a school of six minimum. House the school in a 90-120 cm tank from the aquarium tank range. Refuse any vendor claiming to sell wild Thai stock — it would be illegally collected from a critically endangered species.
Why This Species Earns Its Tank Space
Three things make sidthimunki a strong choice for SE Asian community tanks: peaceful schooling unlike most loaches, attractive chain pattern that holds colour through life, and active midwater behaviour rather than the bottom-hugging habits of larger Botias. They also provide useful pest snail control in planted setups. The conservation context adds meaning — every CB sale supports the breeding programmes that keep the species in existence.
Related Reading
emilynakatani
Still Have Questions About Your Tank?
Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
