Sea sponges can be embedded in to soap, but the soap pictured? That probably is not a sea sponge. It looks like a typical piece of luffa, similar to what I use in my soaps. See?
|Btw, I just added a ton more colors and scents. That's the subject of a later blog post, but I might as well mention it now.|
Sometimes I see both luffa & sea sponges sold as vegan sea sponges, as if sea sponges were a vegetable of the sea. Nope. Luffas are, arguably, a vegan alternative to sea sponges, but to paraphrase one of my least favorite movies*, "Sea sponge, you keep using this word. I don't think it means what you think it means".
This is a sea sponge:
|sea sponges by shira_gal. Used under creative commons license|
This is a luffa/loofah:
|Natural Loofah Sponge by pabadoo. Used under creative commons license.|
Sea sponges are animals that have been removed from the sea and dehydrated. Definitely not vegan.
|Stovepipe Sponge from Wikipedia|
|Luffa gourd from Wikipedia|
Loofahs are kind of scratchy when dry, but soften up slightly when wet. They make a great exfoliating tool. When they dry they harden up again.
Sea sponges are irregular. They can some in all sizes or shapes, like the picture above.
Luffas look basically the same, kind of like how different pumpkins are still recognizable as pumpkins. There is a stronger ring of fibrous material on the outside, and then it comes together in the middle. I admit it does look sea-like, but it is all vegetable.
Both can be broken apart and embedded in soap, but only one comes from the sea and only one is vegan.
*Yes, I know. You may proceed with stripping me of my nerd cred.