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What does a sea sponge do?

Author

Daniel Martin

Updated on March 10, 2026

What does a sea sponge do?

Sea sponges are important in nutrient cycles in coral reef systems. They can remove up to 95% of bacteria and particles from the water and 90% of dissolved organic carbon, thereby converting suspended particles and dissolved matter into food for other animals.

Are sea sponges alive and why?

Sea sponges are one of the world’s simplest multi-cellular living organisms. They grow in all different shapes, sizes, colours and textures. Scientists have identified around 8,500 species, but more than 25,000 are believed to exist in the ocean. There are even some freshwater species, too.

Why are they called sea sponges?

The word ‘Porifera’ comes from the Latin words ‘porus’ (pore) and ‘ferre’ (bear), meaning ‘pore-bearer. ‘ This is a reference to the numerous pores or holes on a sponge’s surface. It is through these pores that the sponge draws in water from which it feeds.

What does a sea sponge eat?

plankton
Sponges are mostly filter feeders and they eat detritus, plankton, viruses and bacteria. They also absorb dissolved nutrients directly from the water through their pinacocyte cells; each cell is responsible for getting their own food!

How do sea sponges poop?

The first animals that arose seem to have literally had potty mouths: Their modern-day descendants, such as sea sponges, sea anemones, and jellyfish, all lack an anus and must eat and excrete through the same hole.

How are sea sponges born?

Sponges may reproduce sexually and asexually. After fertilization in the sponge, a larva is released into the water. It floats around for a few days and then sticks to a solid to begin its growth into an adult sponge. Sponges are also able to reproduce asexually through budding.

Are sea sponges safe as tampons?

Menstrual sponges are natural or synthetic sea sponges that some folks use just like a tampon. Though absorbent and sustainable, their safety is questionable. According to some OB-GYNs, if you clean your sponge thoroughly before and after use, it *might* be safe to use. But that doesn’t mean they recommend them.

How old do sea sponges live?

Sponges can live for hundreds or even thousands of years. “While not much is known about the lifespan of sponges, some massive species found in shallow waters are estimated to live for more than 2,300 years,” the study authors write.

Do sea sponges have brains?

Sponges are among the most primitive of all animals. They are immobile, and live by filtering detritus from the water. They have no brains or, for that matter, any neurons, organs or even tissues.

How long do sea sponges live for?

How are sponges alive?

They are “sessile” animals (they don’t move around) and they live by pumping large volumes of water through their bodies and filtering out tiny organisms and organic particles as food.