Brackish Water Amoebas

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DonSchaeffer
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Brackish Water Amoebas

#1 Post by DonSchaeffer » Sat Dec 04, 2021 1:47 am

https://www.youtube.com/watch?v=trQCD2H4-9s
I have been neglecting the "salt water" sample that I received from my granddaughter's aquarium. I took a look at it today. As expected I found it populated by very small organisms--at the limit of what I could see with my equipment. But as I scrolled along the side of a bit of decaying leaf, I saw a rather odd star-shaped amoeba. Then I saw several others. It amounted to a colony of amoebas obviously targeting the tiny flagellates occupying that part of the biome.

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josmann
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Re: Brackish Water Amoebas

#2 Post by josmann » Sat Dec 04, 2021 3:25 am

Wow, very cool find! I looked through this document: http://www.wfoissner.at/data_prot/Roett ... _1-259.pdf

and found a relevant entry:
They are mainly bound to the substrate and creep during locomotion; they may enter the water column
by drifting after assuming the floating radiosa form
I think what you're seeing is some amoeba species which is generally free floating in your sample. I don't think it can be identified by this form alone - it appears many species will do this under certain circumstances.

Here's a video I found about it: https://www.youtube.com/watch?v=RjOfC-QVHvA
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DonSchaeffer
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Re: Brackish Water Amoebas

#3 Post by DonSchaeffer » Mon Dec 06, 2021 3:36 am

Thanks Josman. That really looks like what I saw, but my view was in a messy setting.

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75RR
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Re: Brackish Water Amoebas

#4 Post by 75RR » Mon Dec 06, 2021 6:19 am

.
Good catch!
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DonSchaeffer
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Re: Brackish Water Amoebas

#5 Post by DonSchaeffer » Mon Dec 06, 2021 8:43 am

Thanks 75RR

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