all day: Marine Life

“Learning, Exploring and Making a Difference” is a full day of learning experiences along and near the shores of San Pedro offered by the Cabrillo Marine Aquarium’s education staff and volunteers. From 9 a.m. to noon, visitors will learn about coastal sage scrub, native plants and animals, and the benefits of drought-tolerant landscapes. From noon to 3 p.m., participants will observe marine specimens, live invertebrates under microscopes, shark skin, birds and shells at the aquarium’s Discovery Sea Laboratory. There will also be opportunities to make a marine-related craft and to gather research information about many oceanic topics. A tide-pool walk to the nearby Point Fermin State Marine Life Refuge (which will be preceded by a slide show orientation) will follow at 3:30 p.m.

* “Learning, Exploring and Making a Difference,” Cabrillo Marine Aquarium, 3720 Stephen White Drive, San Pedro, 9 a.m.-5 p.m. All activities are free except the tide pool walk, which costs $1 per person. (310) 548-7562.

11 am: Art

A selection of 55 works by noted realist painter John Register will comprise a retrospective opening Saturday at the Weisman Museum of Art. A successful advertising executive, Register left the corporate world to focus on painting--he left an important business meeting to go to a dental appointment and never returned. Painting in a style similar to that of Edward Hopper, Register focuses on the lonely spaces inherent in urban and desert landscapes such as abandoned train stations, cafes, old hotel lobbies and vacant offices.

* “John Register: A Retrospective,” Frederick R. Weisman Museum of Art, Pepperdine University, 24255 Pacific Coast Highway, Malibu. Ends April 2. Tuesday-Sunday, 11 a.m.-5 p.m. Free. (310) 317-7257.

10 am: Movies

“Private Confessions,” a 1996 film that actress-turned-director Liv Ullmann made for Swedish television, is finally getting a theatrical (albeit truncated) run in Los Angeles. The screenplay is by Ullmann’s mentor and partner, Ingmar Bergman, and is based on his own parents’ unhappy marriage. The film stars Pernilla August (best known to U.S. audiences as Anakin Skywalker’s mother in the latest “Star Wars” entry) and prolific actor Max Von Sydow.

* “Private Confessions,” Sunset 5, 8000 Sunset Blvd., Hollywood. 10 a.m. Also Sunday, 10 a.m. $5.50 to $8.50. (323) 848-3500.

8:30 pm: Theater

“Hello Muddah, Hello Faddah,” the comic musical revue, returns, celebrating those classic songs by master funnyman Allan Sherman. Created by Douglas Bernstein and Rob Krausz, it follows the life and times of fictional Barry Bockman, from cradle to retirement in Miami Beach.

* “Hello Muddah, Hello Faddah,” University of Judaism, Gindi Auditorium, 15600 Mulholland Drive, Bel-Air. 8:30 p.m.. Also Sunday at 2 (sold out) and 7:30 p.m.; Tuesday at 8 p.m. $25 to $30. (310) 476-9777, Ext. 203.

8 am: Hike

Discovering the natural side of Catalina Island is the objective of The Hike, a monthly excursion into the hills of the island’s interior that starts this weekend. Naturalists Deb Jensen and Jeff Chapman lead the hike, which will follow different trails each month. The cost of the event includes lunch.

* The Hike departs from the Conservancy House, Clarissa Avenue and 3rd Street, Avalon, Catalina Island. 8 a.m.-1 p.m. $18. Reservations required. (310) 510-0954.

8 pm: Theater

In their original comedy, “Breakfast With the Mittlemans,” husband-and-wife comedians and actors Steve Mittleman and Wendy Kamenoff play a dewy-eyed and terrified bride and groom, a zany elderly couple and other wacky characters.

* “Breakfast With the Mittlemans,” Alpert Jewish Community Center, Lipeles Auditorium, 3801 E. Willow St., Long Beach, 8 p.m. $28. (562) 426-7601.

FREEBIES: The Beverly Hills Civic Center Public Art Walking Tour departs at 1 p.m. from City Hall, 450 N. Crescent Drive. (310) 288-2201.

“The Origins of Screen Style: Hollywood Costume Sketches From the Leonard Stanley Archive” is open Saturday and Sunday, noon-6 p.m., Academy of Motion Picture Arts and Sciences, 8949 Wilshire Blvd., Beverly Hills. (310) 247-3600.