How to Identify L155, Spiny Pleco, Porcupine Pleco

To identify L155, Spiny Pleco, Porcupine Pleco (Acanthicus hystrix), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Typically dark grey to black, sometimes with a slightly mottled appearance. Juveniles may exhibit lighter spots or patterns that fade with age.

Scale type

none

Mouth position

inferior

Distinctive features

Extremely prominent and numerous odontodes covering the entire body, including fins, giving a 'spiny' or 'porcupine' appearance., Large, robust head with a relatively small, inferior mouth., Long, filamentous extensions on the caudal fin lobes, especially in adults., Large, well-developed dorsal fin., Strong, bony plates forming a protective armor.

Dorsal fin

Large and tall, with a strong spine and typically 7 soft rays. The first ray is often elongated.

Tail fin

Deeply forked, with the upper and lower lobes often extended into long filaments, particularly in mature specimens.

Pectoral fin

Large and broad, with a strong, serrated spine and several soft rays. Used for propulsion and defense.

Distinctive fins

All fins are covered in odontodes, making them rough to the touch. The adipose fin is present and also armored.

Identification Tips

1. 1

   Odontodes

   The most striking feature is the dense covering of large, sharp odontodes over the entire body and fins. This gives it a distinctly spiny texture, unlike most other Loricariids.

2. 2

   Caudal Fin Filaments

   Adults often possess very long, filamentous extensions on both lobes of the caudal fin, which can be longer than the body itself in some individuals.

3. 3

   Size

   Acanthicus hystrix is one of the largest Loricariids, regularly exceeding 60 cm (24 inches) in length, making it stand out from many smaller pleco species.

4. 4

   Body Shape

   Robust and elongated body, not as flattened as some other Loricariids, with a relatively high dorsal profile.

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