Siliceous Sponges, Marine Sponge, Tubular Sponges, Boreal Sponge, Soft Blue Tube Sponge, Blue Sponge.
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Also known as Siliceous Sponges, Marine Sponge, Tubular Sponges, Boreal Sponge, Soft Blue Tube Sponge and Blue Sponge.
Found on coral and rocky reefs on ledges and walls, spreading and hanging.
They feed on plankton.
Length - spreading
Depth - 5-30m
Sponges come in a range of sizes from minuscule encrusting species under rocks to massive sponges which can be up to one and half metres high.
They are able to filter many litres of sea water every few seconds.
Sponges can exude highly toxic chemicals and so have very few predators apart from nudibranchs, sea stars, sea urchins and umbrella shell.
Their colour can vary if growing in the light or when growing in the shade. (edit)
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