Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Ciliates, Spirochaeta and other bacteria moving in pond water. Dark Field

Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Spirochaeta and other bacteria moving in pond water. Dark Field

Mass of Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Human sperm, masses swimming around, wide pan

Human sperm swimming, noisy background, Phase contrast

Human sperm, masses swimming around, wide locked off

Human sperm swimming, close up, Phase contrast

Human sperm swimming, track across, Phase contrast

Human sperm, medium close up lots sperm swimming around. Interference contrast.

Human sperm swimming, close up, Phase contrast

Human sperm swimming, close up, Phase contrast

Human sperm swimming, close up, Phase contrast

Human sperm swimming, noisy background, Phase contrast

Human sperm, single sperm swimming, makes good progress

Human sperm swimming, close up, Phase contrast

Human sperm, medium lots sperm swimming around, shows shape of heads

Human sperm swimming, close up, Phase contrast

Human sperm swimming, Phase contrast

Human sperm race and then pan across sperm

Human sperm swimming, close up, Phase contrast

Human sperm swimming, Phase contrast