Fig. 6.

Simultaneous recording the state of two eyes in a bottlenose dolphin mother showing that calf’s open eye is generally directed at the mother (A) and calf (B) and the position of the calf (C) during swimming in a counter-clockwise direction. Each mark represents the state of visible eye (R—right, L—left; O—open, C—closed and I—intermediate) or the position of calf next to the mother (I—inner or O—outer) during echelon swimming.