What Is This!!?

EvanBriggs

New Member
Dec 29, 2017
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Arizona
Hey Guys new here, but have learned a lot from reading these threads. Would like to say thank you!

However i have a weird algae looking anemone thing in my aquarium (Or parasite). It is growing basically on everything.

The tank has been setup for about 2-3 months now. I have tried looking up what exactly it is but cant seem to ask the right questions in google... lol

See the images i posted, let me know if you guys need to know anything about the tank, but mainly i am seeking to know if anyone knows what this is..?

Thank you in advance!

algae1_LI.jpg


algae2_LI.jpg


algae3_LI.jpg


algae4_LI.jpg
 

Allwissend

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Jun 20, 2016
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It looks like Hydra viridissima, or green hydra. Fish fry and shrimps will be most affected but also stings adult fish.

The interesting part is that this hydra sp. Is a symbiote with a Chlorella algae, hence the green color. It seems to be more resistant to starving, just like humans with green skin in SF books.

Removal is mainly through drugs such as fenbedazole .
 

EvanBriggs

New Member
Dec 29, 2017
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Arizona
i see, yes i noticed yesterday my SAE's just munching on the algae then it hit one and it like stung him and he moved...

Do you know if that stuff is safe with fish and plants?
 

Allwissend

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For fish and plants yes. Most also have no problems with shrimp. Snails seem to be more hard hit. Instructions for dosing are available on many shrimp sites. The hydra will begin to withdraw and form blobs, then go away.
 

karel.brits

New Member
Oct 18, 2017
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BE
It looks like Hydra viridissima, or green hydra. Fish fry and shrimps will be most affected but also stings adult fish.

The interesting part is that this hydra sp. Is a symbiote with a Chlorella algae, hence the green color. It seems to be more resistant to starving, just like humans with green skin in SF books.

Removal is mainly through drugs such as fenbedazole .
I have the same plant floating around in my aquarium. The aquarium has been set up around three months ago as well. Added fish and shrimps only last Saturday. Didn't see them try to eat this yet. Good to know it stings them, and I might be wise to buy something to remove it from the tank. I thought it was more innocent.

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