This special access does not come cheap. When the program opens to members of the public March 3, people will be asked to pony up $110 each ($95 for children; $65 for members) to be part of a morning group of six who get to visit where the Shedd’s four sea otters spend their offstage hours, instead of just seeing them in their exhibit like everybody else. (The fee for all extraordinary encounters, which can be booked through www.sheddaquarium.org, includes aquarium admission and express entry, a $40 value.)