How to Identify Atlantic Needlefish

To identify Atlantic Needlefish (Strongylura marina), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal surface is typically dark green to bluish-green, fading to silvery on the sides and white on the belly. A prominent silvery lateral stripe often runs along the flanks. Fins are generally translucent or dusky.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Extremely elongated, slender body, Long, beak-like jaws (mandibles) with numerous sharp, conical teeth, Dorsal and anal fins set far back on the body, nearly opposite each other, Small, cycloid scales, Greenish bones (due to biliverdin pigment, harmless)

Dorsal fin

Single dorsal fin, located far posterior, typically with 14-17 soft rays. No spines.

Tail fin

Caudal fin is slightly forked or truncate, with the lower lobe often slightly longer than the upper.

Pectoral fin

Small, located low on the body, with 10-12 rays.

Distinctive fins

Pelvic fins are small and abdominal, located well behind the pectoral fins. Anal fin is similar in shape and size to the dorsal fin, with 16-20 soft rays.

Identification Tips

1. 1

   Jaws

   The most striking feature is the long, slender, beak-like jaws, which are of roughly equal length in adults. Juveniles may have a shorter upper jaw.

2. 2

   Body Shape

   Its extremely elongated, cylindrical body is unmistakable, resembling a spear or needle.

3. 3

   Fin Placement

   The dorsal and anal fins are positioned very far back on the body, almost directly opposite each other, close to the caudal fin.

4. 4

   Coloration

   Dark green to bluish-green back, silvery sides, and white belly, often with a distinct silvery lateral stripe.

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