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Catfish
/ Doradidae / Hancock's Catfish
Striped Raphael Catfish, Chocolate Doradid, Chocolate Catfish
Platydoras costatus | Pictures
Synonyms: Cataphractus
costatus, Doras costatus, Silurus costatus
Physical description: This fish is almost tadpole shaped when viewed from above. The body widens and ends
at a point at the tail. The belly has a straight profile. The base body color is chocolate brown. Three white stripes
form an attractive pattern on the fish. The first extends along the jaw from the tip of the snout to the end of
the pectoral fin. The second runs from the middle of the forehead along a spiny ridge to the tail. The third runs
along the top of the fish's back. There are two pairs of barbels, one on each the lower and upper jaw. The coloring
on the tail makes a Y-shape.
Size/Length: To 8.5" (22 cm)
Similar species: None
Habitat: South America; the Putumayo and Amazon Rivers in Peru
S: bottom
Aquarium: 32" (80 cm) or 30 gallons (114 L) is adequate.
The tank should be well-planted with
a cover of floating plants to diffuse the light.
Use a fine gravel
bottom and provide hiding places with caves,
rocks, wood, and roots.
Algae growth is welcomed.
Water chemistry: pH 5.8-7.5 (7.0), 2-20 dH (10), 75-86°F (24-30°C)
Social behavior: A peaceful fish that is territorial towards its own species.
In territorial disputes, no harm is
done, but simply a display of pectoral and dorsal spines is performed.
Ideal for a community tank with fishes
over 2" (5 cm), as fish smaller than this size may be eaten.
It often hides during the day, and comes
out to feed at dusk.
Suggested companions: South and Central American cichlids, larger characins,
Pimelodus, Trichogaster.
FOOD: Live; snails,
Tubifex , crustaceans, insect larvae, small fish;
tablets; will graze on algae
Sexual differences: Females may be larger.
Breeding techniques: Unsuccessful
Breeding potential: 10.
Breeding attempts of the Striped Raphael Catfish have been unsuccessful.
Remarks: Handle this fish with care; it has several sets of spines. The spines on the inner side
of the pectoral fin can be used to sting.
This catfish emits a talking-like sound when it rubs its pectoral fins
against one another. Easily get entangled in a net, so use a glass jar or plastic bag.
Difficulty of care: 3.
A hardy fish that is not difficult to care for.
Recent articles about fish
Overfishing may hurt Amazon forest trees
(2/5/2008) Overfishing is reducing the effectiveness of seed dispersal by fish in the Brazilian Pantanal, reports Nature. The research suggests that fishing practices can affect forest health.
Scientists find fish that literally lives in trees
(10/17/2007) Scientists have found a fish that literally lives in trees, according to research published in The American Naturalist and highlighted in New Scientist Magazine.
Piranhas originated when Amazon was flooded by seawater
(12/4/2007) South America's piranha family of fish -- notorious as eaters of flesh -- can be traced back to a single ancestor which dispersed when the Amazon was flooded by seawater some five million years ago, report researchers from the Institut de Recherche Pour le Developpement (IRD). Today piranhas are exclusively freshwater fish found from the Orinoco River basin in Venezuela to the Parana in Argentina.
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