Figure 6. — Animals associated with calico 

 scallops on the Cape Kennedy grounds, 

 Florida, include shrimp, crabs, gastro- 

 pod and bivalve mollusks, starfish, brit- 

 tle stars, sea urchins, sand dollars, and 

 fish. (Photo by George C. Miller, Na- 

 tional Marine Fisheries Service.) 



though most remained inactive." Swimming 

 ability, however, may be enhanced by the rela- 

 tively flat, lightweight valves of small scallops 

 as compared with the convex, heavy valves of 

 large scallops (Waller, 1969) which are often 

 heavily fouled (Cummins, see footnote 6). In 

 the laboratory, small scallops swim more readily 

 than large scallops (Fig. 7). On the Cape Ken- 



nedy grounds, scallops 10 to 20 mm in shell di- 

 ameter swam "up to the camera" of RUFAS 

 (Remote Underwater Fisheries Assessment Sys- 

 tem)'' and scuba divers observed a scallop about 

 40 mm in shell height swim to 1 m off the bottom 

 (see footnote 2). From a submersible, lying in 

 a dense concentration of adult scallops on the 

 Cape Kennedy grounds, a few individuals were 



'" Bureau of Commercial Fisheries (now National 

 Marine Fisheries Service) , Brunswick, Ga., Quarterly 

 Report 12/31/69. 



" Bureau of Commercial Fisheries (now National 

 Marine Fisheries Service) , Pascagoula, Miss., RV George 

 M. Bowers Cruise 93, 6/1-3 and 6/17-25/70, July 10, 1970. 



11 



