Sulawesi Tangerine Shrimp care guide
Sulawesi Tangerine Shrimp (Caridina spinata 'Tangerine') — minimum tank 40 L, temperature 27-30 °C, pH 7.8-8.5.
Compiled by Aquairi from published sources · Published · Updated
Overview
Sulawesi Tangerine Shrimp (Caridina spinata 'Tangerine') is a freshwater dwarf shrimp of the family Atyidae, listed in the Aquairi knowledge base as an expert-level species. It is an endemic Sulawesi Caridina that requires hard, alkaline and warm water — the opposite of the soft-water cantonensis lines. Bright tangerine-orange Sulawesi Caridina, hard alkaline warm water specialist endemic to the Malili Lakes system.
Taxonomy
- Family: Atyidae
- Genus: Caridina
- Scientific name: Caridina spinata 'Tangerine'
- Common synonyms: Sulawesi Orange, Sulawesi Tangerine
Habitat
Endemic Sulawesi Caridina inhabit the ancient lakes Matano, Mahalona and Towuti on the Indonesian island of Sulawesi. These tectonic lakes carry hard, alkaline, warm water — a chemistry unique among freshwater shrimp habitats — and the genus has radiated locally into many narrowly-distributed species. The Aquairi knowledge base records this entry from: Malili Lakes, Sulawesi (Indonesia).
Tank requirements
- Minimum tank volume: 40 L (10.6 US gal)
- Adult size: 1-2 cm
- Temperature: 27-30 °C (81-86 °F)
- pH: 7.8-8.5
- GH: 6-8 °dGH
- KH: 4-8 °dKH
- Lifespan: 1-2 years
Diet
A grazing detritivore. In the aquarium the shrimp continuously feeds on biofilm, soft algae, decaying plant matter and dropped food. A small daily ration of a shrimp-formulated sinking pellet, occasional blanched spinach or zucchini and rare protein wafers keep the colony in good condition without polluting the water.
Compatibility
Peaceful and best kept in a colony of ten or more in a stable, well-cycled, planted aquarium. Suitable tank mates listed in the Aquairi knowledge base: Other Sulawesi shrimp, Tylomelania snails. Should be kept away from: Most fish, Cantonensis shrimp, Neocaridina.
Breeding
Reproduces in fresh water without a planktonic larval stage. Mature females develop ripe ovaries visible as a yellow or olive "saddle" on the back; after a successful moult they are fertilised by males and carry the fertilised eggs under the pleopods for roughly three to four weeks before juveniles hatch as miniature fully-formed shrimp. Stable parameters and absence of predation are the main success factors. Sulawesi shrimp breed at a slower rate than cherry shrimp; small clutch sizes (typically 8-20 eggs) and slow juvenile development demand long-term stability.
Sulawesi Black Diamond Shrimp Breeding Guide (Caridina spinata)
Overview
The 'Black Diamond' is a dark purple-black aquarium form of Caridina spinata, an Atyidae shrimp endemic to Lake Towuti in Sulawesi's Malili lake system, where the species occupies rocky slopes around 3-5 metres deep. It shares the Sulawesi profile: hard alkaline warm water and direct development, with hatchlings emerging as tiny adults rather than larvae. The wild species is Critically Endangered, affected by predatory introduced flowerhorn cichlids, aquarium-trade collection, and habitat pollution from activities such as nickel mining.
Conditioning
Aim for steady pH in the 7.8-8.5 range, GH about 6-8, KH 4-8 and warmth of 27-29 C, usually achieved with remineralised RO water and a Sulawesi mineral salt. Keep dissolved nutrients minimal, as the Malili lakes are nutrient-poor and the shrimp are not adapted to nitrate or phosphate buildup. The diet rests on biofilm and detritus grazed from hardscape, with only light supplementary feeding.
Breeding Setup
Use a biologically mature species tank from 40 litres with rockwork that echoes the natural rock slope. Keeping at least ten individuals reduces the stress these shy shrimp show and improves pairing. Filtration should be gentle yet well-established, and any new water must be matched to tank temperature and pH before it is added, because sudden shifts are poorly tolerated.
Spawning & Berried Females
Berried females hold roughly 20-30 eggs under the abdomen and fan them with the pleopods until they hatch after about 20-28 days. There is no planktonic larval stage; the young emerge as miniature copies of the parents. The moderate brood size means a healthy, stable group can build a colony steadily once water chemistry is reliable.
Shrimplet/Larval Care
Shrimplets need no brackish or salt phase and feed on the same biofilm and detritus as the adults from day one. Keep nutrient levels low and supplementary food fine and infrequent. The early weeks are most threatened by parameter instability, so any maintenance changes should be small and slow.
Common Challenges
The recurring problem is holding mineral-rich but alkaline, low-nutrient water at a stable warm temperature; these shrimp react strongly to changes in light and chemistry, making acclimation and transport risky. With the wild species Critically Endangered, captive-bred animals are the responsible source for new stock.
Sulawesi Tangerine Shrimp Breeding Guide (Caridina spinata)
Overview
Caridina spinata is an Atyidae shrimp endemic to Lake Towuti, part of the Malili lake system on Sulawesi, where adults are found over rocky substrate at depths of about 3-5 metres. The 'Tangerine' is a bright orange aquarium form of this Sulawesi species. Like its relatives it needs hard, alkaline, warm water and is a direct developer that releases miniature shrimplets. Wild populations are Critically Endangered, pressured by introduced flowerhorn cichlids that prey on Caridina, collection for the trade, and pollution including nickel mining.
Conditioning
Provide stable mineral-rich alkaline water around pH 7.8-8.2, GH near 6-8, and a warm 27-29 C, typically built from remineralised RO water with a Sulawesi-specific mineral salt and a target conductivity near 300 microsiemens. The Malili lakes are nutrient-poor, so nitrate, nitrite and phosphate should stay near zero. Biofilm and detritus grazed from rock supply most of the diet; feed sparingly to protect water quality.
Breeding Setup
A mature species tank of at least 40 litres with rocky structure reproduces the deeper rock-slope habitat and gives cover. A group of ten or more lowers stress and encourages breeding; reports note that ten shrimp can grow to around a hundred within six months in a tank rich in biofilm with low bacterial pressure. Filtration should be gentle and biologically established, with temperature and pH held steady.
Spawning & Berried Females
Females carry 20-30 eggs beneath the abdomen, fanning them with the pleopods until they hatch in roughly 20-28 days. There is no free-swimming larval stage: hatchlings emerge as miniature versions of the adults. Compared with Sulawesi cardinals the brood is moderate, so a stable colony can expand at a reasonable pace once conditions are dialled in.
Shrimplet/Larval Care
Newly hatched shrimplets require no brackish or salt phase and graze the same biofilm and detritus as adults. Keep nutrient levels low and any supplementary food fine and minimal. The young are sensitive to light, temperature and pH swings, so maintenance changes should be small and gradual.
Common Challenges
Maintaining mineral-rich yet alkaline, nutrient-poor water at a stable warm temperature is the central difficulty, and these shrimp are very sensitive to external stimuli including light and parameter shifts. Acclimation and transport carry real risk. Because the wild species is Critically Endangered, captive-bred stock is preferable to wild-collected animals.