L185 Evil Cactus Pleco (Pseudacanthicus sp.)

L185 Evil Cactus Pleco (Pseudacanthicus sp.)

The L185 Evil Cactus Pleco is one of the most impressive and highly sought-after cactus plecos in the hobby. Native to the rocky, fast-flowing waters of Brazil’s Xingu River, this powerful species is recognized for its jet-black body, heavy armor, pronounced spines, and striking spotted fins. As it matures, it develops an even more commanding appearance, making it a true centerpiece for large aquariums. Due to its limited availability and specialized care requirements, the L185 is considered a prized fish among serious pleco collectors.  

This species thrives in highly oxygenated water with strong flow, excellent filtration, and plenty of large caves and rockwork. Primarily carnivorous, the L185 benefits from a protein-rich diet including sinking carnivore pellets, shrimp, mussels, fish, and other meaty foods. While generally peaceful toward similarly sized fish, it can become territorial with other bottom-dwelling plecos, especially in confined spaces.

Max Size: 16–18 inches
Temperament: Semi-aggressive to territorial
Diet: Carnivore (high-protein pellets, shrimp, fish, mussels, and other meaty foods)
Care Level: Advanced
Origin: Xingu River Basin, Brazil
Recommended Tank Size: 180 gallons or larger