09 The out-of-doors exhibit (no longer there) of the New England Aquarium in 1981.  Thoughtless people would throw pennies into the pool, and the seals ingested them and became ill.  One seal, 08 A harbor seal swims by. 04 At the indoor sea lion & dolphin exhibit aboard a specially-designed ship (also now gone), the animals performed a few times each day.  They weren't tired out, because different teams of animals performed, each only once per day. Here, a sea lion jumps through a hoop while another claps and barks. 01 A dolphin 02 A graceful leap. 03 Four dophins leap. 05 A tail-walk. 06 A back-flip. 07 Synchronized different-height leap.