lost one last month, it had some small hyroid-y looking things on it. I think they irritated the mantle enough that it retracted and wasn't getting enough light. Anyways it croaked. Today I find another one with two aiptasia living inside the shell at one of the ends. I scraped them out with a needle and hopefully that will work, it had its mantle retracted too.
Probly not the info you're looking for but I've had a lot of caffeine
