Psychedelic seaslugs that outshine their garden cousins

These stunning creatures may look like terrifying monsters from the deep - but they are in fact only an inch long.

Some of the two-inch sea slugs have intense and bright colouring to warn predators they may be poisonous

The Nudibranchs, commonly known as sea slugs, are incredibly difficult to spot as many resemble the texture and colour of surrounding plants. Divers can spend years in the sea without ever seeing one because they are so cleverly disguised.

Others have intense and bright colouring that warns predators they are potentially poisonous.

The incredible images were taken by researcher and photographer Thomas Vignaud, who was diving off the coast of southern France.