The Bailey-Matthews National Shell Museum & Aquarium will hold a “Shell Ambassador Certification Course” on Jan. 30 from 8:30 a.m. to 5 p.m. at its facility, at 3075 Sanibel-Captiva Road, Sanibel. Taught by museum staff, it will prepare attendees to become an ambassador volunteer and to educate and engage with beach-goers and fellow shellers. Topics will include local shell identification, mollusk biology, dune plant and animal identification, Sanibel beach laws, tides, and identification of other beach finds. Cost is $120 for museum members and $150 for non-members; coffee, a light breakfast and lunch will be included. For more information or to register, visit ShellMuseum.org/classes.