Heal the Bay’s Santa Monica Pier Aquarium will celebrate Earth Month with presentations and activities for all ages Saturday and Sunday, April 16 and 17.

The marine education center at 1600 Ocean Front Walk, Santa Monica, will be open from 11 a.m. to 6 p.m. both days for its Earth Month festivities.

Beach cleanups will be ongoing both days between 11 a.m. and 2:30 p.m. Volunteers are asked to meet in front of the aquarium to receive supplies and a safety talk prior to cleaning the beach. All participants must sign a waiver, and the aquarium will offer free admission to everyone who first cleans the beach.

Among the scheduled activities in the aquarium are face painting, story times, scavenger hunts and crafts projects for children as well as displays, films, presentations and activities focusing on shark conservation. Visitors can also learn about ocean pollution by attending a “Who Pollutes?” presentation, held both days at 2 and 4:30 p.m.

The festival will offer visitors the opportunity to check out marine life off the west end of the pier at a wildlife observation station, equipped with binoculars and field guides, and staffed by aquarium naturalists.

Admission is free for children under 13 when accompanied by an adult; for all others admission is $3, with a suggested $5 donation. Groups of 10 or more are $2 per person.

Information, (310) 393-6149, or www.healthebay.org/smpa.