Breeding the Snow King Pleco (Pterygoplichthys ambrosettii)

Breeding biology of Pterygoplichthys ambrosettii: a large sailfin pleco that spawns in riverbank burrows guarded by the male. Not practical to breed in home aquaria.

Overview

Pterygoplichthys ambrosettii is a large sailfin suckermouth catfish in the family Loricariidae from the Parana basin of southern South America. Members of the genus are facultative air breathers with a greatly expanded, highly vascularised stomach sac that helps them survive in poorly oxygenated water. The genus is covered in scientific reviews of the global invasion of Pterygoplichthys, alongside species such as P. pardalis, P. disjunctivus and P. multiradiatus.

Spawning Behavior & Trigger

Reproduction in the genus involves males excavating burrows (tunnels) into mud or clay banks, where the eggs are laid and the male then guards them. The reproductive guild is described as guarders and nesters, with external fertilisation and spawning occurring across the year. These bank-nesting habits, combined with high fecundity, contribute to the genus's success as an invader.

Egg & Fry Care

The male guards the egg-filled burrow; in some fisheries eggs are collected from male-guarded burrows for the aquarium trade. Although Pterygoplichthys gibbiceps is bred commercially on fish farms in Florida and Malaysia, most species in the genus do not readily reproduce in standard aquaria because the burrow-spawning requirement is hard to replicate.

Common Challenges

The species' large adult size and dependence on deep bank burrows for spawning cannot be reproduced in a home tank, so hobby breeding is not realistic. Supply for the trade relies on wild capture and pond aquaculture.