Thornback Ray Eggcase

Thornback Ray Eggcase © Shark Trust.Latin Name: Raja clavata 

Capsule: Looks like home-made ravioli when the horns are discounted. Almost as wide as long, resulting in a relatively fat and ‘square’ capsule.

Capsule Size: Approximately 50-90mm long x 34-68mm wide excluding horns (when soaked).

Horns (when present): Of equal length to one another; more than half the length of the capsule, but never longer than capsule.

Lateral keels: Relatively deep compared to other eggcase species, up to 10mm deep (when intact).

Fields: Present at both ends of capsule. Deep.

Characteristic features: Extremely deep lateral keels (when intact). A relatively fat and ‘square’ capsule when compared to other species of eggcase.
 
Similar Eggcases: Blonde Ray (Raja brachyura) and Spotted Ray (Raja montagui).

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