How to Spot a Shark Digital Download

How to Spot a Shark Digital Download


Digital Download

The elasmobranchs are a group of fishes which includes all sharks, rays, skates and sawfish. The elasmobranchs are a subclass of Chondrichthyes which are fishes that have a skeleton made from cartilage rather than bone. Cartilage is a strong and flexible, allowing them to move easily and fast through the water.

The skin of moat elasmobranch species is covered in tiny flat V-shaped scales, called dermal denticles. These denticles decrease drag and turbulence, allowing the shark to swim faster and more quietly. Sharks also have a very large, oil-rich liver. This is how they control their buoyancy.

The small pores you may notice on an elasmobranchs nose are called ampullae of Lorenzini. They are special sensing organs called electroreceptors. These organs help elasmobranchs sense electric fields in the water.

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