If it did, then it is possibly a baby ricordea mushroom. I can kind of see the green mouth in the pic (but I might just be see things...)
The two adults have been releasing them about every 2-3 months.
The babies tend to get released and can float around.
When they go somewhere dark and do not get enough light, they tend to bleach out a bit.
Their full color will return with time, and with appropriate light.