Fig. 1.

The spontaneous spatial reorientation task developed for zebrafish (Lee et al., 2012c). The subject observes a conspecific in the goal location (C), is covered and rotated slowly for disorientation, and is then released into the empty tank to navigate freely. Approaches within 1 cm to a corner jar are coded as choices. Choosing the correct corner and its rotationally geometric twin (R) over the near (N) and far (F) errors indicates successful use of the rectangular shape of the arena.