Beachgoers in Margate, UK, were left stunned after discovering a mysterious sea creature with a skeletal head and fishtail ...

These creatures are toxic and pose a serious threat ... One local said the number of washed-up sea slugs was particularly bad. 'My kelpie died from one of these, such a horrible death,' she ...

Photos of the mystery jetsam, which is partially buried in sand and surrounded by seaweed, show that it has a gaunt, ...

These creatures are toxic and pose a serious threat ... One local said the number of washed-up sea slugs was particularly bad. 'My kelpie died from one of these, such a horrible death,' she ...

Two foam-covered beaches have been closed after surfers complained of coughing and skin irritations, and dead sea creatures ...

An unusual sea creature washed up on a Miami beach, leaving a family completely transfixed by its beauty - but it has a dark side. The family were relaxing in the spring sun, when they noticed ...

This blue sea creature, despite its small size, is rather aggressive by nature. If you encounter one of these washed up on the beach, avoid it. There is no telling if the Glaucus atlanticus is storing ...

Thousands of blue dragons washed up on beaches across Texas last March ... to be careful not to step on or touch the tiny one-inch sea creatures, as doing so could result in a painful sting.

"These creatures are toxic and potentially pose a serious threat ... Warnings are often issued for pets because they may lick, chew or eat washed-up sea hares, leading to poisoning. Symptoms in dogs ...