Need help with an odd creature I saw in a fresh, cold water lake. A fresh water jelly fish? It was about the size of a quarter, clear, and had 3 or 4 white spots. Instead of the usual "tenticals" trailing behind, it had spikes (hair thin) that stuck out in front of it. Other than that it moved like a jellyfish. Although Im not a big FW diver,I swear that in over 30 years of diving, I never saw one. Help??