P-105 blue spongeBLUE SPONGE, Dysidea sp.

A purple bluish sponge that grows in seagrass beds, and has the unique ability to extract nickel from the seawater and concentrate it in its tissues. Although it has a definite shape, Dysidea will adhere to the gravel in your aquarium, at any angle. Excellent for reaggregation experiments. Size: 4-6 cm.