This video says about itself:
16 May 2014
The small-spotted catshark or lesser spotted dogfish, Scyliorhinus canicula, is a cat shark of the family Scyliorhinidae found on the continental shelves and uppermost slopes off Norway and the British Isles south to Senegal. Behavioral analysis showed that S. canicula uses a consistent behaviour pattern termed ‘scale rasping’, as a feeding mechanism.
The sharks uses this mechanism by anchoring food items near their tail so that their rapid head and jaw movements can tear away bite-sized pieces from their prey. They are able to anchor food items near their body due to the tooth-like structures that are embedded in their skin. These structures normally assist with protection from predators, parasites and abrasions to the skin. This type of feeding in S. canicula can also be done due to their elongated body morphology.
Dec 1, 2015 – A special find on the beach of Den Helder. Remon Arents last weekend spotted a small-spotted catshark in the surf. It was a young specimen. Remon estimated the animal at 40 centimeters. Adult small-spotted catsharks can be one meter long. Small-spotted catsharks are small sharks, harmless for people. They also live in the North Sea. Yet it is not so often that one washes ashore.