Orinoco Sailfin Catfish

The Orinoco sailfin catfish is a large Pterygoplichthys that may be sold as an "algae eater" together with the common pleco (P. pardalis) and the vermiculated sailfin pleco. The "multiradiatus" in its name comes from the many rays in its dorsal fin. Adults reach 40–50 cm, and some individuals are reported to grow even larger.

Fish released into the wild by owners trying to get rid of them have become established in tropical and subtropical regions, above all in Florida in the USA, and are monitored as invasive. A fish that has outgrown its aquarium must never be released into the wild.

• At least 750 liters and 200 cm length for one adult; a pond is more suitable.
• A very powerful filter, frequent water changes.
• Large roots and sturdy caves; it uproots and eats plants.

An omnivore leaning toward a herbivorous diet. Make algae and vegetable tablets, blanched zucchini, potato, cucumber and spinach the staple; frozen food can be given occasionally.

Peaceful toward other species; as it grows it becomes territorial toward its own kind and other large bottom dwellers. It has been observed sucking the slime coat of slow, flat-bodied fish.

Good companions: Large, fast fish: oscars, silver dollars, large barbs, large cichlids (in a very large aquarium).

Avoid: Small aquariums, slow fish such as discus, angelfish and goldfish, planted layouts.