How to Identify European Squid

To identify European Squid (Loligo vulgaris), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Highly variable, ranging from translucent white to reddish-brown, often with iridescent hues. Possesses chromatophores allowing for rapid color changes and pattern displays for camouflage, communication, and hunting. Can display stripes, spots, or a uniform color.

Scale type

none

Mouth position

terminal

Distinctive features

Elongated, cylindrical mantle tapering to a point posteriorly., Large, prominent eyes., Two long, slender tentacles with suckers only at the club-like ends, used for capturing prey., Eight shorter arms lined with suckers., Rhomboid-shaped fins that extend for about two-thirds of the mantle length.

Dorsal fin

Not applicable (cephalopod)

Tail fin

Not applicable (cephalopod)

Pectoral fin

Not applicable (cephalopod)

Distinctive fins

Two large, rhomboid-shaped fins located on the posterior two-thirds of the mantle, used for propulsion and steering.

Identification Tips

1. 1

   Mantle Shape and Fin Length

   The mantle is elongated and cylindrical, tapering to a point. The rhomboid fins extend for approximately two-thirds of the mantle length, a key differentiator from other Loligo species.

2. 2

   Tentacular Club

   The tentacular club (the expanded end of the tentacles) has four rows of suckers, with the central suckers being significantly larger than the marginal ones.

3. 3

   Coloration and Chromatophores

   Observe its rapid color-changing abilities. While not unique to this species, the specific patterns and speed of change can be indicative.

4. 4

   Gladius (Pen)

   If examining a deceased specimen, the internal gladius (chitinous pen) is long and slender, characteristic of the genus Loligo.

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