OZ REEF - Envious Boys?

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Sponges can typical pump water equal to 4-5 times its own volume every minute. For a sponge about the size of a football, this equates to several thousand liters each day.

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Envious Boys?

Barnacles can extend it's penis up to 30 times the length of its body. Barnacles are sessile and unable to move from their settled location. In order to overcome this motility problem, the barnacle can extend it penis to any near neighbour in order to impregnate them with it's sperm.

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