Mandy411 Posted March 22, 2023 Share Posted March 22, 2023 These are all over my qt tank glass today. I do feed baby brine regularly. They seem to be hydra with jellyfish ends instead of the normal "arms." Has anyone else seen these? Link to comment Share on other sites More sharing options...
Guppysnail Posted March 23, 2023 Share Posted March 23, 2023 Can you post a photo? Link to comment Share on other sites More sharing options...
Mandy411 Posted March 23, 2023 Author Share Posted March 23, 2023 I tried, sorry didn't know it fell off! Link to comment Share on other sites More sharing options...
Mandy411 Posted March 23, 2023 Author Share Posted March 23, 2023 Facebook group suggested bryozoans. I think they're right! Thanks to everyone who looked 🙂 Link to comment Share on other sites More sharing options...
Biotope Biologist Posted March 23, 2023 Share Posted March 23, 2023 Going to need a better photo. Bryozoans are colonial animals that can resemble hydra. But I can’t tell what I’m identifying here 1 Link to comment Share on other sites More sharing options...
Mandy411 Posted March 23, 2023 Author Share Posted March 23, 2023 I tried again, but that really is the best I can do with my phone camera 😞 Most of it is gone today. I purposely fed my danio erythromicron lightly this morning, but I dont know if that is where they went. I will look into better equipment for future photos. Thanks for the reply! Link to comment Share on other sites More sharing options...
JesseDubs Posted March 23, 2023 Share Posted March 23, 2023 Kinda tough to tell from your photo, but it's definitely similar to something I had all over my glass for a while. I eventually determined after a ton of googling that they were Zoothamnium. As far as I can tell they're harmless - I wiped mine off with an algae sponge while doing a water change. 1 Link to comment Share on other sites More sharing options...
Mandy411 Posted March 24, 2023 Author Share Posted March 24, 2023 I googled zoothamnium and whatever I have looks exactly like the pictures that popped up. They were pics from posts like mine of hobbyist trying to identify them. Thanks for sharing. Link to comment Share on other sites More sharing options...
Expectorating_Aubergine Posted March 24, 2023 Share Posted March 24, 2023 Fun fact: freshwater jelly fish exists. We have a species in the US that's an invasive. Link to comment Share on other sites More sharing options...
Mandy411 Posted March 24, 2023 Author Share Posted March 24, 2023 @Biotope BiologistManaged to get a better picture...hope it helps! Link to comment Share on other sites More sharing options...
Biotope Biologist Posted March 24, 2023 Share Posted March 24, 2023 Honestly that looks like salt crystallization on the glass do they move? Bryozoans and hydra will pulsate although the first photo looks nothing like either. and I’m pretty sure freshwater zoothamnium max out at around 0.5mm so would not be visible to the naked eye. Some marine species can get to about 3-5mm. 1 Link to comment Share on other sites More sharing options...
Mandy411 Posted March 24, 2023 Author Share Posted March 24, 2023 @Biotope Biologist They are attached to the glass at the stalk end and sway if I make current around them with hand or tongs. Other than that they're stationary. I'm starting to accept I'll never know what they are, lol. Link to comment Share on other sites More sharing options...
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