Animal World

Sponges, Coelenterates, and Worms

How much water does an average sponge circulate during a day?

The stings of a jellyfish can be very painful and dangerous to humans, but they are generally not fatal. Most stings cause a painful, burning sensation that lasts for several hours. Welts and itchy skin rashes may also appear. Only the sting of the box jelly, or sea wasp (Chironex fleckeri), can result in death in humans. The box jelly is the only jellyfish for which a lifesaving, specific antidote exists.

A sponge that is 4 inches (10 centimeters) tall and 0.4 inch (1 centimeter) in diameter pumps about 23 quarts (22.5 liter) of water through its body in one day. To obtain enough food to grow by 3 ounces (100 gram), a sponge must filter about 275 gallons (1,000 kilograms) of seawater.


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