St. Regis Residences in Boston is announcing a partnership with Tailwind Air in which residents of the Seaport’s newest luxury building can depart from their back dock and travel by seaplane to Nantucket, New York City, and other destinations.

Service to Nantucket begins on May 17. Traffic jams are now optional.

Fifteen-minute swan boat rides in the Boston Public Garden lagoon return for the season. Weather permitting, the boats will run daily through September from 10 a.m. until 5 p.m.

The Department of Conservation and Recreation hosts “Let’s Have a Ball! The First Jurassic Mud Ball Festival In 200 Million Years.” Families are encouraged to join the department to celebrate “mud season” with an exploration of rare Jurassic-age rocks found only in Turners Falls: armored mud balls. Sunday, 2 p.m., Great Hall, Great Falls Discovery Center, 2 Ave. A, Turners Falls.

An Everett man pleaded guilty this week to exerting secret control over a Massachusetts-based company, Cannabiz Mobile, Inc., as part of a pump-and-dump securities fraud scheme.

Christopher R. Esposito, 56, pleaded guilty to one count of securities fraud before U.S. District Court Judge Patti B. Saris who scheduled sentencing for July 26. Esposito was charged in August 2022.

Esposito and a co-conspirator, Anthony Jay Pignatello, worked together between 2012 and 2015 to conceal their control over Cannabiz Mobile, Inc. and to use backdated promissory notes to fraudulently obtain free-trading shares in the company.