Fig. 5. A magnetic map in spiny lobsters. Lobsters from the middle Florida Keys were subjected to magnetic fields that exist in locations north or south of the location where they were captured. As with juvenile green turtles, lobsters subjected to the field from the northern site oriented approximately southward, whereas those exposed to the field from the southern site crawled approximately north. The open triangle outside each orientation diagram indicates the actual direction to the capture site from the test site. In each case, lobsters responded as if they had been displaced to the locations marked by the stars rather than orienting in the direction that was actually toward the capture site. Conventions are as in Fig. 2. (Modified from Boles and Lohmann, 2003.)