How to Identify Maroon Clownfish

To identify Maroon Clownfish (Premnas biaculeatus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Deep reddish-brown to maroon body, often appearing almost black in some individuals. Typically features one to three bright white or yellow vertical stripes. The 'Lightning Maroon' morph exhibits a striking white reticulated pattern over the maroon body. Fins are generally the same color as the body or slightly darker.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Two prominent, sharp spines located on each cheek (preopercle), giving rise to its alternative name 'Spine-cheeked Anemonefish'. These spines are a key distinguishing feature from all other clownfish species., Robust, deep body compared to other clownfish., Pronounced sexual dimorphism in size, with females growing significantly larger than males.

Dorsal fin

Single dorsal fin with 9-10 spines and 16-18 soft rays. The spiny and soft-rayed portions are continuous.

Tail fin

Caudal fin is typically rounded or slightly emarginate.

Pectoral fin

Large, rounded pectoral fins.

Distinctive fins

Anal fin with 2 spines and 13-15 soft rays. Pelvic fins are also present.

Identification Tips

1. 1

   Cheek Spines

   The most definitive identification feature: two sharp, forward-pointing spines on each side of the head, just below the eye. No other clownfish species possesses these prominent spines.

2. 2

   Coloration and Stripes

   Deep maroon to reddish-brown body color with one to three vertical white or yellow stripes. The number and thickness of stripes can vary, but the overall dark body color is consistent.

3. 3

   Body Shape

   More robust and deeper-bodied than most other clownfish species, giving it a somewhat 'stocky' appearance.

4. 4

   Size

   Can grow larger than many other clownfish species, with females reaching up to 17 cm (6.7 inches) in length.

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