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<blockquote data-quote="EnterName" data-source="post: 14416130" data-attributes="member: 253296"><a href="https://www.reef2reef.com/threads/microscopy-thread.1138845/page-3#post-14401843" target="_blank">Post #51</a> 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:[ATTACH=full]4498226[/ATTACH]
(Semi-Transparent &quot;tentacle&quot; moving in the current)
Bulkreefsupply has a <a href="https://media2.cdn.bulkreefsupply.com/media/wysiwyg/Articles/pests/hydroid-digitate.jpg" target="_blank">better image</a> which they attribute to Reef2Reef, but I did not find the original source yet.[ATTACH=full]4498227[/ATTACH]
(The very same tentacle under a microscope)</blockquote>

[QUOTE="EnterName, post: 14416130, member: 253296"] [URL='https://www.reef2reef.com/threads/microscopy-thread.1138845/page-3#post-14401843']Post #51[/URL] 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: [CENTER][ATTACH type="full" width="512px" alt="PXL_20260630_193927739.jpg"]4498226[/ATTACH] (Semi-Transparent "tentacle" moving in the current) [/CENTER] Bulkreefsupply has a [URL='https://media2.cdn.bulkreefsupply.com/media/wysiwyg/Articles/pests/hydroid-digitate.jpg']better image[/URL] which they attribute to Reef2Reef, but I did not find the original source yet. [CENTER][ATTACH type="full"]4498227[/ATTACH] (The very same tentacle under a microscope)[/CENTER] [/QUOTE]

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