Identification: Water fleas? Ciliate?

I have been exploring the ecosystem of an artificial local pond. I’m coming across so many samples and it is so wonderful: to look at so many things you didn’t expect, and equally wonderful is the enigma of what are these things?

And that is why I’ve done so many posts seeking identification, as I want to confirm if I’ve got it right or know more about what I’ve seen!

So, the first is an organism which I suspect to be a water flea.

These fleas were visible through naked eyes as well, and they had kind of a random galloping motion at the bottom of the jar (the top was flushed with algae).

I then used the paper well slide to pick up one of these critters and observe it under a foldscope:

And voila, I could observe it eating some gunk. It was immobilised, because of the thickness of the slide. I could observe distinct mouth parts, leg like parts, antennae like parts, compound eyes and a whole range of internal body organs (which I cant identify).

It also seems to have small hair like structures on its body like cilia perhaps.

I projected it on a wall, and goofed around a bit!

Make for a creepy yet fun photoshoot !

The next organism i’m confused about is a ciliate. I mainly want to know what species it is!

It has a quick jerky rolling motion at times, which makes it difficult to photograph and focus.

It was moving around in circles…:

One thing that I learnt and understood from this video was ciliate motion in all its beauty!

Manan

2 Comments Add yours

  1. laksiyer says:

    Hi @Manan. The crustacean is quite nice. You can see some eggs in it too. These are generally called Cladocerans. Looks like Moina, but you need to use a key for precise identification. Try to see if you can breed these. Sometimes dried yeast is enough and you might get them going for months. You can then study the different forms, sexes and transformations.

    The second reminds me of the several flagellates that I have encountered. They typically show this large-spiral type motion. Could be a euglenozoan? Needs more color information. Great job, keep it going.

  2. MananSuri says:

    Thank you once again @laksiyer .
    I no longer have the water flea samples (the sample died around the time the jar started smelling of H2S), but I will try to collect them again very soon and culture them. Sure would be an insightful experience…

    As for the flagellate, I am very sorry, but the it was just plain black and white under the foldscope and I couldn’t obtain any color information..

    I would like to thank you again for your encouragement. I’ve been reading your posts recently and I am always in awe and inspired! 🙂

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