I googled "bryozoan colonies" but did not find a picture or description that matches. Some are close but here are some of the differences in what I have:

It is smooth, no star-shaped growths on the outside.

It is not solid. I can not pick it up. It will disintegrate into a thick brown liquid out of the water or smaller brown "gobs" in the water.

One description of the smell was accurate though. "The gel inside, once opened, was obviously not silicone and it had a foul odor. Not a rotten type of a smell but not unlike feces. It's rather hard to describe."