How to Identify Greater Weever

To identify Greater Weever (Trachinus draco), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically greenish-brown to yellowish-brown, often with irregular dark spots, stripes, or blotches that aid in camouflage. The flanks are lighter, and the belly is whitish. The first dorsal fin is dark to black.

Scale type

cycloid

Mouth position

superior

Distinctive features

Two dorsal fins: the first is short with 6-7 venomous spines, and the second is long with 29-32 soft rays., A sharp, venomous spine on each operculum (gill cover)., Eyes positioned high on the head, allowing it to see prey while buried., Protrusible mouth angled upwards.

Dorsal fin

First dorsal fin short with 6-7 venomous spines; second dorsal fin long with 29-32 soft rays.

Tail fin

Caudal fin truncate to slightly emarginate.

Pectoral fin

Pectoral fins are moderately sized.

Distinctive fins

Pelvic fins are jugular (located anterior to the pectoral fins) with one spine and five soft rays.

Identification Tips

1. 1

   First Dorsal Fin

   Look for the short, dark to black first dorsal fin with 6-7 prominent, sharp spines. This is a key indicator of a weeverfish.

2. 2

   Opercular Spines

   Observe the sharp, upward-pointing spine on each gill cover. These are also venomous.

3. 3

   Body Shape and Coloration

   Its elongated body, cryptic brown/greenish coloration with darker markings, and upward-facing eyes are characteristic.

4. 4

   Behavior

   If seen, it will often be partially buried in sand or mud, with only its head and dorsal fin visible.

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