Sinibotia reevesae (CHANG, 1944)

SynonymsTop ↑

Botia reevesae Chang, 1944

Classification

Order: Cypriniformes Family: Botiidae

Distribution

This species was described from the middle Yangtze Jiang (Yangtze River) in Luxian County, Sichuan Province, southwestern China, and to date is still known only from that area.

It appears that it’s either difficult to catch or occurs only in low densities across this restricted range and it may eventually prove to have a wider distribution.

Habitat

In November 1990 the type locality contained clear water flowing moderately to slowly over a substrate composed mostly of sand with some rocks (Yang and Chen, 1992).

Sympatric species include Leptobotia elongata, L. microphthalma, and L. taeniops plus Zacco, Opsarichthys, and Siniperca spp. (S. Sung, pers. comm.).

Maximum Standard Length

The largest officially-measured specimen measured 94.5 mm.

Aquarium SizeTop ↑

An aquarium base measuring at least 120 ∗ 30 cm or equivalent is recommended.

Maintenance

All botiid loaches need a well-structured set-up although the actual choice of décor is more-or-less down to personal taste.

A natural-style arrangement could include a substrate of sand or fine gravel with plenty of smooth, water-worn rocks and pebbles plus one or two lumps of driftwood or twisted roots and branches.

Lighting can be relatively subdued and plants able to grow in such conditions like Microsorum, Taxiphyllum, or Anubias spp. can be added if you wish. These have an added benefit as they can be attached to pieces of décor in such a way as to provide useful shade.

Otherwise be sure to provide plenty of cover as botiids are inquisitive and seems to enjoy exploring their surroundings. Rocks, wood, flower pots and aquarium ornaments can be used in whichever combination to achieve the desired effect.

Bear in mind that these fish like to squeeze themselves into small gaps and crevices so items with sharp edges should be omitted, and any gaps or holes small enough for a fish to become trapped should be filled in with aquarium-grade silicone sealant. A tightly-fitting cover is also essential as they may jump at times.

Sinibotia spp. appear to prefer faster-flowing water than most botiids and can be maintained in larger hill stream-style set-ups, though provided the water is well-oxygenated with a degree of flow very turbulent conditions aren’t mandatory.

They are however intolerant to accumulation of organic wastes and requires spotless water in order to thrive.

For this reason they should never be introduced to biologically immature set-ups and adapt most easily to stable, mature aquaria. In terms of maintenance weekly water changes of 30-50% tank volume should be considered routine.

Water Conditions

Temperature: 20 – 25.5 °C

pH: 6.5 – 8.0

Hardness: 36 – 268 ppm

Diet

Likely to be a benthic predator hunting insects, crustaceans and smaller fishes in nature.

Captive specimens aren’t fussy but should be offered a varied diet comprising live or frozen bloodworm, Tubifex, chopped shellfish, earthworms and good quality, sinking dried foods.

Once settled into the aquarium feeding behaviour can be somewhat vigorous with the fish often ascending into midwater to feed.

Behaviour and CompatibilityTop ↑

This species is typically reclusive and tends to occupy quieter areas of the tank or remain under cover when not feeding. It’s also very peaceful and safe to keep with many other fishes provided they can cope with the same environmental conditions.

Particularly suitable tankmates include pelagic cyprinids such as many Devario, Rasbora,  ‘Puntius‘, Mystacoleucus, and some Danio spp., while in larger tanks members of Barilius, Luciosoma, Balantiocheilos, and Barbonymus become options.

In terms of other bottom-dwellers this species should do well alongside most Botia and Sinibotia spp. and in very large tanks, Chromobotia macracanthus.

Many balitorid, cobitid, gastromyzontid and nemacheilid loaches are also possibilities as are members of Epalzeorhynchos, Crossocheilus, and Garra plus many catfishes. As always, thorough research prior to selecting a community of fishes is the best way to avoid problems.

Sinibotia spp. are gregarious and seemingly form complex social hierarchies, therefore 3-4 specimens should be the minimum purchase.

When kept singly they occasionally become withdrawn or aggressive towards similarly-shaped fishes, and if only a pair or trio are purchased the dominant individual may stress the other(s) to the extent that they stop feeding.

Sexual Dimorphism

Unconfirmed but females should be heavier-bodied once sexually mature.

Reproduction

Unrecorded in aquaria; presumably a seasonal, possibly migratory spawner in nature.

NotesTop ↑

This species not often seen in the aquarium trade and is apparently rare in its natural waters, with the occasional individual imported as bycatch in shipments of S. pulchra or S. robusta, or by private collectors. Like others in the genus it has a highly flexible, sinuous body which makes it very interesting to observe.

It’s told apart from congeners by the following combination of characters: snout shorter than post-orbital length of head; sides of head without brown, vermiform markings or spots; eye diameter measuring 12.3-13.5% of head length; interorbital width 28.8-30.0% head length; body with 7-8 dark, vertical bars; light spaces between the bars are narrower than the bars themselves; four dark stripes on the head; dorsal and anal fins with poorly-defined black stripe; pectoral and pelvic fins with dark, submarginal band; caudal-fin reddish with a dark, continuous vertical stripe in the anterior portion and one or two dark bands on each lobe.

The genus Sinibotia currently contains six species, all of which are native to China plus in at least one case, Laos. All were also previously considered to belong to Botia.

Not a great deal of information has been published since the turn of the century but Yang and Chen (1992) stated that it can be separated from related loach genera by the following combination of characters: suborbital spine strong and bifurcate; top of cranium without fontanelle; possession of three pairs of barbels and one pair of mental ‘buttons’ (rounded mental lobes in lower lip); minute scales; cheeks scaleless; dorsal-fin located closer to caudal-fin base then snout; caudal-fin forked; anterior portion of swim bladder usually enclosed in a partial-to-completely ossified capsule, posterior portion of swim bladder not enclosed.

The family Botiidae has been widely considered a genetically distinct grouping since Nalbant (2002), having previously been considered a subfamily (Botiinae) of the family Cobitidae. Nalbant also moved some previous members of Botia into the new genus Yasuhikotakia based on a number of morphological characters.

Later Kottelat (2004) made further modifications to the taxonomy, raising Chromobotia for B. macracanthus and confirming that species previously included in the genus Hymenophysa should instead be referred to Syncrossus.

The former alteration was based on colour pattern plus some morphological characters and the latter because Hymenophysa not only represents a spelling mistake (McClelland’s original spelling was Hymenphysa) but is a junior synonym of Botia.

More recently Kottelat (2012) erected the genus Ambastaia to accommodate A.nigrolineata and A. sidthimunki, two former members of both  Botia and Yasuhikotakia.

As a result of these works the family Botiidae is thus divided into two tribes within which Botia appears to be the most basal lineage:

Tribe Leptobotiini – Leptobotia, Parabotia, Sinibotia.
Tribe Botiini – Ambastaia, Botia, Chromobotia, Syncrossus, Yasuhikotakia.

Phylogenetic studies by Tang et al. (2005) and Šlechtová et al. (2006) have largely confirmed this system to be correct although the latter disagreed with the placement of Sinibotia, finding it to be more closely related to the tribe Botiini.

Ambastaia nigrolineata and A. sidthimunki were found to be more closely-related to both Sinibotia and Syncrossus than Yasuhikotakia, despite being considered members of the latter at the time. Šlechtová et al. also proposed the use of subfamily names under the following system:

Subfamily Leptobotiinae – Leptobotia, Parabotia.
Subfamily Botiinae – Botia, Chromobotia, Sinibotia, Syncrossus, Yasuhikotakia.

Within these Botia appears to be the basal, i.e., most ancient, lineage and in a more-detailed phylogenetic analysis Šlechtová et al. (2007) confirmed the validity of the family Botiidae with the genera listed above as members rather then being grouped into subfamilies. This more recent, simpler system is the one we currently follow here on SF.

Sinibotia spp. also possess sharp, motile, sub-ocular spines which are normally concealed within a pouch of skin but erected when an individual is stressed, e.g., if removed from the water. Care is therefore necessary as these can become entangled in aquarium nets and those of larger specimens can break human skin.

Botiids are also susceptible to a condition commonly referred to as ‘skinny disease’ and characterised by a loss of weight. This is especially common in newly-imported specimens and is thought to be caused by a species of the flagellate genus Spironucleus.

It’s treatable although the recommended medication varies depending on country. Hobbyists in the UK tend to use the antibiotic Levamisole and those in the United States Fenbendazole (aka Panacur).

References

1. Kottelat, M., 2012 - Raffles Bulletin of Zoology Supplement 26: 1-199
   Conspectus cobitidum: an inventory of the loaches of the world (Teleostei: Cypriniformes: Cobitoidei).
2. Kottelat, M., 2004 - Zootaxa 401: 1-18
   Botia kubotai, a new species of loach (Teleostei: Cobitidae) from the Ataran River basin (Myanmar), with comments on botiine nomenclature and diagnosis of a new genus.
3. Nalbant, T. T., 2002 - Travaux du Museum d'Histoire Naturelle 'Grigore Antipa' 44: 309-333
   Sixty million years of evolution. Part one: family Botiidae (Pisces: Ostariophysi: Cobitoidea).
4. Nalbant, T. T., 2004 - Travaux du Museum d'Histoire Naturelle 'Grigore Antipa' 47: 269-277
   Hymenphysa, Hymenophysa, Syncrossus, Chromobotia and other problems in the systematics of Botiidae. A reply to Maurice Kottelat.
5. Tang, Q., B. Xiong, X. Yang, and H. Liu. 2005 - Hydrobiologia 544(1): 249-258
   Phylogeny of the East Asian botiine loaches (Cypriniformes, Botiidae) inferred from mitochondrial cytochrome b gene sequences.
6. Tang, Q., H. Liu, R. Mayden, and B. Xiong, 2006 - Molecular Phylogenetics and Evolution 39(2): 347-357
   Comparison of evolutionary rates in the mitochondrial DNA cytochrome b gene and control region and their implications for phylogeny of the Cobitoidea (Teleostei: Cypriniformes).
7. Yang, J.-X. and Y.-R. Chen, 1992 - Ichthyological Exploration of Freshwaters 2(4): 341-349
   Revision of the subgenus Botia (Sinibotia) with description of a new species (Cypriniformes: Cobitidae).
8. Šlechtová, V., J. Bohlen, and H. H. Tan, 2007 - Molecular Phylogenetics and Evolution 44(3): 1358-1365
   Families of Cobitoidea (Teleostei; Cypriniformes) as revealed from nuclear genetic data and the position of the mysterious genera Barbucca, Psilorhynchus, Serpenticobitis and Vaillantella.
9. Šlechtová, V., J. Bohlen, J. Freyhof, and P. Ráb, 2006 - Molecular Phylogenetics and Evolution 39(2): 529-541
   Molecular phylogeny of the Southeast Asian freshwater fish family Botiidae (Teleostei: Cobitoidea) and the origin of polyploidy in their evolution.