Lophopus crystallinus, commonly known as the bellflower animal or crystal moss animal, is the first[1] species ever described of the genus Lophopus, from the Lophopodidae family, and is the only member of the family that can be found in the UK.

[2] The species are colonial, and have a gelatinous outer wall.

It prefers cold climate, and is tolerant of eutrophication.

However, in spring fed pools they could live and reproduce forever.

[5] It is listed as a priority species under the UK Biodiversity Action Plan.