Anyone familiar w/ Convoluta roscoffensis (Green Flatworm)

[Carl Sagan Reborn]

What’s up guys? I’m from the states and I’m interested in the green flatworm.
Convoluta roscoffensis is a translucent flatworm which appears to be green due to the colony of Platymonas algae which breeds and dies within it.

Because of these photosynthetic partners, the worm no longer needs to find its own food. While feasting on the sugar produced by the algae, the young worm no longer has a need for its mouth. And now the algae have a safe haven from predators, a moving greenhouse if you will. It's a beautiful 'living' example of symbiosis.

I'm currently reading 'Symbiotic Planet' by Lynn Margulis and I'm fascinated by this creature. How common are these flatworms? I hear they’re almost in plague proportions on the shores of the UK and France.

I'd love to see one; so I tried to find a fish breeder or something of that sort online. Does anyone know of any companies that provide them whether it be for research or as a pet (online breeders)? How would you guys suggest getting a hold of a few?

Thanks for reading,
CSR