Hippospongia communis is a brown or darker color[1] and very porous, due to its many oscules, and is commonly found in shallow waters of the Mediterranean.

The most common areas that Hippospongia communis inhabit are marine waters, mostly in the Western Mediterranean[2] or the South Aegean Sea.

[4] The sponge settles on rocky or muddy bottoms and it is common to find them in ocean caves.

Its porous structure and spongey exterior made it perfect for people throughout history, as far back as 1900 BC, to use it as a household item.

In particular, the honeycomb bath sponge was used for things like cleaning, hygiene, cooking and agriculture in Rome.

The sponge is also hermaphroditic,[9] meaning it has both male and female reproductive organs at the same time.

It has been found that during its sexual reproduction, regardless of the location, the Hippospongia communis eggs will fertilize at the same time.

The bath sponge reproduction times are all synced throughout different locations that the H. communis inhabit.