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Corydoras acutus, Cope, 1872


Origin:South-Amerika, Equador, Pastaza-Jatun Cocha at rio Yasuni, Rio Napo system. Peru, Loreto, Rio Ampiyacu, Rio Yavari, Rio Huytoyacu.

Etymology: Acutus(L)=Sharp, referring to the snout.

Synonyms: C. stenophalus

First import:Unk

Description:Bodycolour beige, Dark spots on the side, fins clear, except for dorsal(black blotch) and tail with small spots which form vertical stripes.

Care:Frequent waterchanges and a reasonable current.

Temperature:20-24 degrees.

Feeding:Make sure they do get some food occasionally. A small feeding after the light can solve feeding problems.

Size:7 cm.

pH: 6.5-7.5

Breeding: Has been bred under aquariumconditions. Use a standard breeding tank for corydoras ( See Corydoras breeding tank). Feed the fish well for 2-3 weeks, and perform weekly 10% waterchanges. Keep the temperature at 24 °C.Then perform a 50% waterchange with colder water. Temperature may sink to 16-19°C. Normally this will induce spawning. (Do not turn of the heater, let the temperature return to normal).

If this doesn't induce spawning, continue 50% colder waterchanges every other day. Lowering the waterlevel for a period of time may also help. Using a watersoftener, and changing the pH towards neutral or a little acid may also help.

Eggs are approximately 1.5 mm, mostly on the glass corners. Remove the eggs or the parents(better). After 4 days the eggs will hatch. Keep the water very clean by performing daily waterchanges. Feed small portions(artemia or ground flake) several times a day. Keep the waterlevel low, and the temperature of the air equal to the watertemperature to prevent colds.

Adult colouration is reached in 8-10 weeks.

Sexual dimorphism:Check from above, females are more triangular in shape, they are fatter behind the gills, while males are equal or thinner behind the gills.

Prices:

Additional:The dark blotch in the dorsal fin can vary in intensity depending on the environment.

Picture references:None

References: Lambourne, D.(1995); Hieronimus, H.(1997).

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