ATTACK ALIEN ALGAE — Volunteers needed 8 a.m.-noon Nov. 18 to remove algae from the Waikiki Natatorium. Bring snorkeling gear if you plan to go in the water. Snack and lunch provided. Contact Signe Opheim at 779-2616 or opheim@hawaii.edu.

HOLIDAY GIFT TO MAUI — The Community Work Day program will holds its annual Holiday Gift to Maui cleanup 8 a.m.-noon Nov. 18 at various sites. Call (808) 877-2524.

KAWAI NUI PROJECT — Service project at the Kawai Nui Marsh state park 8:30 a.m.-12:30 p.m. Saturday. Bring lunch, water, rain gear, bug repellent, gloves, tools. Call Chuck "Doc" Burrows at 595-3922 or Rick "Kaimi" Scudder at 589-2963.