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Preference for crabs and shrimps by 3-day-old cuttlefish. (a) After no crab exposure (n=16) and after different lengths of a five-crab exposure: 15 min (n=17), 30 min (n=14), 60 min (n=20), 90 min (n=15) or 120 min (n=13). (b) By period of familiarization, post-hatching. The first day of life was divided into 2 h periods, 2 h after sunrise (sr), during which cuttlefish were exposed to five crabs (sr+2 h, n=11; sr+4 h, n=18; sr+6 h, n=10; sr+8 h, n=15). χ2-exact test: *p<0.05.
