Aquascope Facts
Cliff and rocky beach ecology

Inner and outer fishing apparatus

Certain suspension feeders, e.g. plumose anemone , hydroids and the polychaete Pomatoceros triqueter do nothing more than hold up their tentacles in the water currents. When the water currents are very weak, suspension feeders run the risk of getting too little food, but there are suspension feeders that are able to create currents to increase the amount of food, for example barnacles.
    To enable mobility and to be able to catch very small particles of food, the tentacles have to be very light and finely constructed, but this also makes them brittle and sensitive to wave action and attacks from predators. Therefore, many creatures suck water into their bodies where the tentacles are well protected. This is the case with the bread crumb sponge, blue mussel and the sea squirt.
Scypha sp 21 kB
The yellow sponge in the picture above is of the Scypha family . Water is pumped through the body and edible particles are caught. The largest sponge is about 7 cm long.

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Cliffs and rocks are fantastic!
Zoning and flecked occurrence
Animals that are attached
Modular construction
Variation and change
Variations in water level
Wave exposure
Both cliffs and rocks
Freshwater and saltwater
Geography, climate and history
Organisms life cycles
Organisms effect on each other
Energy and the flow of material

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Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson