|
Dozens of different creatures that need little or no light live in these underwater caves. At the cave entrances and in rock crevices white, brown or phosphorescent yellow tube anemones feed on plankton carried towards them by currents. Jackfish live on red sponge in dark cavities, cracks and caves, making use of camouflage as protection from their enemies. Bryozoa, also known as sea mats, live on plankton and other microorganisms. Another creature which lives on cave walls in semidarkness is the yellow encrusting anemone Parazoanthus axinellae, which forms colonies on sponges of the species Axinella, which is also yellow in colour. Seeing these marine creatures, many of which are only to be found in caves, is one of the greatest attractions for divers. Yet cave diving is also the most dangerous.
|