How to Identify Greater Pipefish

To identify Greater Pipefish (Syngnathus acus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Highly variable, ranging from green, brown, or yellowish to reddish, often mottled or banded to match their surroundings (e.g., seagrass, algae, sand). This cryptic coloration provides excellent camouflage.

Scale type

none

Mouth position

terminal

Distinctive features

Long, slender, pipe-like body, Small, tubular mouth at the end of a long snout, Body covered in bony rings (scutes), Absence of pelvic fins, Small, fan-like caudal fin

Dorsal fin

Single, relatively short dorsal fin located towards the posterior half of the body, typically with 36-48 soft rays.

Tail fin

Small, fan-shaped caudal fin, usually with 10 rays.

Pectoral fin

Small, rounded pectoral fins, typically with 13-18 rays.

Distinctive fins

Pelvic fins are absent. Anal fin is very small, with 3-4 rays.

Identification Tips

1. 1

   Body Shape and Snout

   Its extremely elongated, slender body and long, tubular snout are key identifiers. The snout length is typically 1.5 to 2.0 times the postorbital length of the head.

2. 2

   Dorsal Fin Ray Count

   Counting the dorsal fin rays (36-48) can help distinguish it from other pipefish species, though this requires close observation.

3. 3

   Body Rings

   The number of trunk rings (17-20) and tail rings (38-43) are consistent features, though difficult to count in the field.

4. 4

   Coloration and Camouflage

   Observe its coloration, which is highly adapted to its immediate surroundings. It often has dark bands or spots that further aid in camouflage.

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