River explorations – benthic invertebrate


Hi everyone!

I have been thinking about a project I could do with Foldscope to learn more about rivers, specifically their ecosystem. So I joined a local river ecosystem guide and played in the mudflat to get to know more about my aquatic/benthic neighbors.

The mudflat was made of very soft silt with about 15 ~ 30 cm layer of water, and when you walk into it your feet could easily get caught deep in the silt. I was at some point knee deep in the mud, and it was very difficult to walk.

There I saw several kinds of fish (one shown below), crabs (forgot to take pictures), and lots and lots of invertebrates.  I am always amazed how a small patch of mudflat can provide home to so many kinds of species.

I used my homemade plankton net (made with a glass jar with holes in the lid, nylon stockings, wire, and a rope) to catch some microorganisms.

Dragging the net in the river water
Homemade plankton net


The video I share below shows you a tiny shrimp-like invertebrate that I spent a lot of time with.

Let me know if anyone know how to identify this species!


2 Comments Add yours

  1. laksiyer says:

    What an interesting eye. Are each of those dots a simple eye or a collection of them?

  2. Honomi says:

    Yes, the eye captivated me, too! I found a local group who seems to know well about the river ecosystem, so I’m going to ask them. https://www.facebook.com/kitakyushu.gyobu.1044186/videos/

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