ミクロの小宇宙～Microcosmic Explorers～　（２０）川に棲む小さな生きものたち

Picked one by one from a mixed channel; title passed two strict editor passes and the clickbait rules.

A 14-minute video from SCIENCE CHANNEL（JST）: “ミクロの小宇宙～Microcosmic Explorers～　（２０）川に棲む小さな生きものたち”.

Video by SCIENCE CHANNEL（JST）, played through YouTube's embedded player.