Spawning sequence of Notopterus notopterus during night time. Picture sequences selected from a one hour period of observation from automatized Webcam recordings with red to infrared-light. Egg deposition occurred in different positions, while the male accompanied the female in every action. (a) The male pushed gently the female’s belly with its mouth to the desirable spawning substrate; (b) both fish were seen floating very close to each other after the male fertilized the eggs; (c) the second spawn of the female followed soon after first fertilization by the male; (d) male pushes the female again to another substrate near the first location of spawning; (e) the male immediately fertilizes the eggs; (f) the female deposits eggs for the last time in this series.