The L34 Medusa Pleco (Ancistrus ranunculus) is a distinct, small-to-medium (approx. 13cm) armored catfish native to the Rio Xingu in Brazil. Males are distinguished by extensive, long, branched, bush-like tentacles covering the head, which are much more prominent than in females. They are nocturnal, territorial omnivores requiring high oxygen, strong flow, and plenty of hiding.
Key Characteristics and Care
Appearance: Dark gray to blackish-blue with a slightly mottled, flat, and textured body.
Male Characteristics: Mature males have much longer, more numerous, and branched tentacles, along with larger odontodes (gill spikes) used for fighting. They also have a broader head and a thicker hard ray on their pectoral fins.
Size: Maximum length is roughly 13cm
Diet: Omnivorous, requiring a mix of algae, biofilm, sinking pellets, and occasional meaty foods (frozen bloodworms, brine shrimp).
Temperature: 25-30 degrees
pH: 6.0 - 7.5
Tank Setup: Requires a well-oxygenated tank with high water flow. Provide plenty of wood, rocks, and caves for hiding.
Behavior: Generally peaceful but, as with most Plecos, males can be territorial with each other.
SKU: RBM
