OLLA, SAMET, and STUDHOLME: SUMMER FLOUNDER 



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Figure 5. — Bottom feeding by a swimming fish. A swimming fish (A) visually fixes 

 on a shrimp on the bottom, partially brakes its forward motion (B), and tilts toward 

 the sand. As the caudal fin beats downward, the mouth opens, the opercula spread, and 

 the fish moves ahead to ingest the shrimp (C, D). 



its mouth several times. Then, without lunging 

 or striking at the prey, the fish would swim away 

 after a few seconds. 



We found feeding intention movements to oc- 

 cur after the fish had been feeding. For in- 



stance, in one case, after we had introduced 

 1,100 g of shrimp into the tank (29 days after 

 the last feeding of 4,400 g of shrimp), the fish 

 began to feed within 3 min. One fish, after eat- 

 ing 13 shrimp within a 22-min period, exhibited 



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