How to Identify Lesser Weever

To identify Lesser Weever (Echiichthys vipera), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically greenish-brown to sandy-yellow, often mottled with darker spots or bands, providing excellent camouflage. The ventral side is whitish. The first dorsal fin is black.

Scale type

cycloid

Mouth position

superior

Distinctive features

Small, compressed body, tapering towards the tail., Large, upward-pointing eyes positioned on top of the head., Protruding lower jaw., Two distinct dorsal fins: the first is short with 5-7 venomous spines, and the second is long with 21-24 soft rays., A venomous spine on each operculum (gill cover).

Dorsal fin

Two dorsal fins: the first is short and black with 5-7 sharp, venomous spines; the second is long, extending almost to the caudal fin, with 21-24 soft rays.

Tail fin

Slightly forked or truncate caudal fin.

Pectoral fin

Rounded pectoral fins.

Distinctive fins

Pelvic fins are jugular (located anterior to the pectoral fins) and are also equipped with a spine.

Identification Tips

1. 1

   Size

   Small fish, typically reaching a maximum length of 14 cm (5.5 inches), though most commonly observed between 8-10 cm (3-4 inches).

2. 2

   First Dorsal Fin

   Distinctive black first dorsal fin with 5-7 sharp, venomous spines. This fin is often the only part visible when the fish is buried.

3. 3

   Opercular Spine

   Presence of a prominent, sharp, venomous spine on each gill cover.

4. 4

   Eyes and Mouth

   Eyes are positioned high on the head, and the mouth is upward-pointing with a protruding lower jaw, adapted for ambushing prey from below.

5. 5

   Coloration

   Sandy or mottled brown/greenish coloration on the dorsal side, blending seamlessly with sandy substrates.

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