How to Identify Estuary Eel

To identify Estuary Eel (Anguilla reinhardtii), look at these key features.

Physical Characteristics

Body shape

eel-like

Coloration

Dorsal surface typically dark olive-green to brown, often mottled or marbled. Ventral surface is paler, yellowish to off-white. Coloration can vary with habitat and age.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Very long dorsal fin originating well forward of the anal fin, extending almost to the head., Prominent lower jaw that extends beyond the upper jaw., Small, embedded scales that are not easily visible., Large, well-developed pectoral fins.

Dorsal fin

Very long, originating far forward, confluent with caudal fin.

Tail fin

Rounded, confluent with dorsal and anal fins.

Pectoral fin

Large and fan-like, located just behind the head.

Distinctive fins

Absence of pelvic fins.

Identification Tips

1. 1

   Dorsal Fin Origin

   The dorsal fin originates significantly further forward than the anal fin, often closer to the head than the vent. This is a key differentiator from other Anguilla species in its range.

2. 2

   Lower Jaw

   The lower jaw is noticeably longer and protrudes beyond the upper jaw.

3. 3

   Coloration and Pattern

   Often exhibits a mottled or marbled pattern on its dorsal surface, which can help distinguish it from the more uniformly colored Short-finned Eel (Anguilla australis).

4. 4

   Pectoral Fins

   Relatively large and fan-shaped pectoral fins.

Explore Estuary Eel