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. 2019 Apr 18;8:e44753. doi: 10.7554/eLife.44753

Video 5. Negative phototaxis of control and picrotoxin-treated Ciona larvae in 10 cm petri dishes.

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DOI: 10.7554/eLife.44753.021

Picrotoxin-treated larvae can be seen to stop swimming at ~1 hr. Directional 505 nm illumination is from the left. Frames were taken at one per minute over five hours. In the video the 5 hr is compressed to 15 s (i.e., 1200X normal speed). Black and white tones were inverted to make the larvae more visible.