The grass snake

We did 8 km walk at forest in the morning and there was the grass snake in one lake waterfront. It went to swim and i had time to take shots. In the water, there is lot of pine pollen and water looks dirty. At extra, we visited classic local circus school spring show, where several groups give their best. Taking photos in this hall have been complex to me and i tried new settings. Last time i used manual mode and shutter speed was 1/250 second. That was too slow to stop some fast actions. However, now i tested shutter priority mode and set shutter speed to 1/400 second. Results are better. I need to make set of photos to this hobby club and they can use these as they like.