Found thousands of these translucent blue, plastic-looking ovals washed up on the beach today. They have a stiff fin on top and blue jelly underneath. Are they dangerous?

2. How To Tell Velella Velella From Other Jellyfish
Velella velella can be distinguished from other jellyfish by several key characteristics. Unlike the typical umbrella-shaped bell of a jellyfish, Velella have a flat, oval body with a rigid, triangular sail on top. This sail is oriented diagonally, which helps them harness the wind for movement.
Their blue color is also a notable feature, ranging from bright cobalt to a more subdued navy. Unlike the notorious Portuguese Man o’ War, which Velella are sometimes mistaken for, they lack the long, trailing tentacles that are characteristic of other stinging cnidarians.
3. Are They Dangerous To Touch?
Velella velella are generally considered harmless to humans. While they do possess nematocysts, which are small stinging cells used for capturing prey, their sting is not potent enough to penetrate human skin. Most people can handle them without experiencing any adverse effects.
However, it is always advisable to exercise caution when handling marine life. Some individuals with sensitive skin may experience mild irritation, so it’s best to gently observe them without direct contact, especially for those with known allergies.
4. Risks For Children, Pets, And Sensitive Skin

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