B) Without fish twitch, eels did not follow doublets with attack (10 trials each for two eels).
Fig. 4 tabB: Fish doesn't move after the eel's doublet because of the plastic bag isolation. Thus no response for the eel that there is a fish behind the agar barrier and no attack.
(B) Expansion of the first doublet and corresponding tension trace (off-scale peaks were estimated).
Fig. 3 tab B: This panel is a zoomed picture of the first signal of panel A. It shows that the fish moves only some Milliseconds after the eel's doublet of shocks.
B) All eels induced whole-body tension, occurring 2 to 4 ms after strong discharge onset. No tension was developed from weak discharge. At low frequencies, individual twitches emerged for each discharge (top right) (fig. S2).
fig. 2 tab B: Eel EOD = eel electric organ discharge = every red peak represents an electric shock by the eel When the eel starts shocking in a cascade, the fish tension changes, which means that it moves. little top right figure: Also when the eel sends only out single shocks with longer Pauses, the fish moves very time.
(B) Video frames showing that fish movement is arrested by discharge. Red frames indicate electric organ discharge (movie S1)
Fig. 1 -tab B: the little fish is paralysed starting from 60 ms till the end. This is indicated by the red filter on the photographs.