This article is from the Aquaria: Good (and Bad) First Fish; Breeding FAQ, by Dean Hougen and Elaine Thompson
Red-Tailed Catfish - Phractocephalus hemiliopterus are particularly
large-growing predatory catfish. A dark body with a horizontal white
stripe and red tail gives them an attractive appearance at a small
size that has unfortunately made them a popular aquarium fish with
those who fail to appreciate the enormity of adults. Adults may grow
to well over 4' in length and have mouths that more than match their
lengths. As such, they are more than many public aquaria can house,
not to mention private aquarists.
 
Continue to: