OP
OP
Post #51 shows a hydroid in its medusa form (jellyfish-like).
I was fortunate enough to find a different hydroid form in my tank today. Usually it is impossible to find these things in older tanks, but since I have upgraded tanks these things pop up again.
You might have seen these white or transparent tentacles in your tank. They like to attach to reef rock and irritate corals:
(Semi-Transparent "tentacle" moving in the current)
Bulkreefsupply has a better image which they attribute to Reef2Reef, but I did not find the original source yet.
(The very same tentacle under a microscope)
I was fortunate enough to find a different hydroid form in my tank today. Usually it is impossible to find these things in older tanks, but since I have upgraded tanks these things pop up again.
You might have seen these white or transparent tentacles in your tank. They like to attach to reef rock and irritate corals:
(Semi-Transparent "tentacle" moving in the current)
(The very same tentacle under a microscope)
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