How to Identify Pea Puffer

To identify Pea Puffer (Carinotetraodon travancoricus), look at these key features.

Physical Characteristics

Body shape

rounded

Coloration

Dorsal surface is typically mottled with shades of brown, green, and yellow, often with irregular dark spots or blotches. The ventral surface is usually lighter, ranging from white to pale yellow. Males often display a more vibrant coloration, particularly during breeding, and possess a distinct dark stripe along their belly. Iridescent 'wrinkles' or lines behind the eyes are also more pronounced in males.

Scale type

none

Mouth position

terminal

Distinctive features

Smallest freshwater pufferfish species, rarely exceeding 2.5 cm (1 inch)., Ability to inflate their bodies with water or air when threatened., Large, independently moving eyes., Fused teeth forming a 'beak' for crushing shells., Sexual dimorphism: males have a distinct dark belly line and iridescent post-orbital 'wrinkles'.

Dorsal fin

Single, small, and set far back on the body, typically with 9-10 soft rays.

Tail fin

Rounded to truncate, relatively small.

Pectoral fin

Small and fan-like, used for precise maneuvering.

Distinctive fins

Absence of pelvic fins. Anal fin is small and located opposite the dorsal fin, typically with 7-8 soft rays.

Identification Tips

1. 1

   Size

   Its exceptionally small size (up to 2.5 cm) immediately distinguishes it from most other pufferfish.

2. 2

   Coloration and Markings

   Mottled brown/green/yellow body with irregular dark spots. Look for the distinct dark belly line and iridescent post-orbital markings in males.

3. 3

   Eyes

   Large, independently moving eyes are characteristic of pufferfish and very noticeable on this small species.

4. 4

   Body Shape

   A somewhat rounded, compact body that can inflate when stressed.

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