Petrobius maritimus

Petrobius maritimus, the shore bristletail or sea bristletail, is a species of Archaeognatha found on rocky shores from the Mediterranean Sea to the North Sea.

Individuals may grow up to 15 mm and are grey in colour, with long bristly antennae and a triple forked tail.

They are very resistant to low temperatures, and remains active even if the temperature drops below 0 degrees C.