I've got one Inca snail(I believe that's what it is called). It's about 1.5 inches shell length. I just put it into my new 30 gallon tank from my 20. This keeps happening, the long tube on the left side of the snail. There are no other snails in this tank. What on earth is this? What does it mean? I've had this snail for almost a year and saw this once in the other tank, but twice in the new tank within 4 hours.