Sea Squirts or Tunicates exist in staggering profusion in certain locations - see previous picture. Growing to just about 12cms in height, they can be found all around Britain wherever there is limited tide or wave action and are particularly attracted to docks and piles. Semi-transparent, they are usually a greenish blue but can occasionally be a bright orange. The rims around the siphons is a pale yellow. They filter plankton from the water and in the picture, the gut can be clearly seen.
Loch Hourn, Western Scotland