This method of protection can keep almost all predators at bay - but not the kaleidoscopically colourful sea slug. Nudibranchs ... Glaucus atlanticus - also known as the sea swallow, blue angel or ...

1.The person who found a blue dragon sea slug — whose sting can cause nausea, vomiting, and an allergic skin reaction — and thought, "I'll just go ahead and pick that up": ...