10 am: Family

View the migration of the gray whale aboard a whale-watching boat, search for dolphins, sea lions and sea birds along the coastline with experts from the Cabrillo Marine Aquarium in San Pedro, after a slide show and lecture on whales.

* Migration of the gray whale, Cabrillo Marine Aquarium, 3720 Stephen White Drive, San Pedro. Slide and lecture: 10 a.m.; followed by a two-hour voyage on a whale-watching boat. $16 ($14 for aquarium members). Advance reservations required. (310) 548-7562.

All day: Movies

The International Documentary Assn. and the Directors Guild of America are co-sponsoring DocuDay, an all day screen-a-thon of all five of this year’s Oscar-nominated long documentaries, and three of the shorts (two of the short docs are Imax films and must be seen on a large-format screen). Among the films to be screened: Spike Lee and Sam Pollard’s “4 Little Girls,” local filmmakers Michele Ohayon and Julia Schachter’s “Colors Straight Up,” Dan Gifford and William Gazecki’s “Waco: The Rules of Engagement.” All of the filmmakers are scheduled to be on hand for discussions after the screenings of their films. (For complete schedule see Page 34.)

* DocuDay, Directors Guild of America Theatre, 7920 Sunset Blvd., West Hollywood. 10 a.m.-midnight. $5-$7. (213) 480-3232.

All day: Oscar Countdown

If the names Matt Damon and Judi Dench aren’t familiar to you yet, get thee to a cineplex! Some of the films to catch up with if you want to be current around the water cooler Tuesday morning: “Good Will Hunting” (nine nominations); “L.A. Confidential” (nine); “As Good as It Gets” (seven); “Wings of the Dove” (four); “Boogie Nights” (three); “Mrs. Brown” (two); “The Sweet Hereafter” (two); “Wag the Dog” (two); “Afterglow” (one); “The Apostle” (one); and if you’ve been living in a cave, “Titanic” (14). You can rent “The Full Monty” (four nominations) and “Donnie Brasco” (one). “Four Days in September,” at the NuWilshire, is the only foreign language film nominee in release, and most of the best documentary nominees are at the Monica 4-Plex or Sunset 5. And since you probably won’t have to squeeze into a gown or tux come Monday evening, eat all the buttered popcorn you want.

* Check the film listings for theaters and show times. The NuWilshire, 1314 Wilshire Blvd., Santa Monica (310) 394-8099; Sunset 5, 8000 Sunset Blvd., West Hollywood, (213) 848-3500; Monica 4-Plex, 1332 2nd St., Santa Monica, (310) 394-9741. (The 70th Academy Awards will be broadcast Monday on ABC at 6 p.m.)

5 pm: Theater

“Blame It on the Movies! (The Reel Music of Hollywood),” the Ron Abel-Billy Barnes-David Galligan musical revue, pays tribute to 40 years of great Hollywood film songs. To name a few: “An Affair to Remember,” “As Time Goes By” and “I Got a Gal in Kalamazoo.”

* “Blame It on the Movies! (The Reel Music of Hollywood),” Pasadena Playhouse, 39 S. El Molino Ave., Pasadena. Sunday, 5 p.m. Regular schedule: Tuesdays-Fridays, 8 p.m.; Saturdays, 5 and 9 p.m. and Sundays, 2 and 7 p.m. through April 26. $13.50-$42.50. (800) 233-3123.

4 pm: Music

With songs from 1934’s “The Continental” to 1994’s “Can You Feel the Love Tonight,” Sing! Sing! Sing!--Judy Wolman’s sing-along company for grown-ups--is returning for its sixth annual program of Academy Award-winning songs with a musical tribute to 60 years of Oscar favorites. All songbirds--secret shower singers included--are welcome.

* Sing! Sing! Sing!, Jazz Bakery, 3233 Helms Ave., Helms Bakery Arts Complex, Culver City. $12. (310) 546-5470; (310) 271-9039.

6:30 & 9 pm: Country Music

It’s starting to look like an annual tradition: Country music legend Merle Haggard returns to Bakersfield for a homecoming show at the Crystal Palace, the honky-tonk emporium his homeboy Buck Owens opened a while back. Besides soaking up the incomparable Haggard sound, you can drink in the bar, eat at the restaurant, browse in the museum and stock up on memorabilia at the gift shop.

* Merle Haggard at the Crystal Palace, 2800 Pierce Road, Bakersfield. Sold out. (805) 328-7500.

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FREEBIE: The Thelonious Monk Institute of Jazz’s “Bebop to Hard Bop: Jazz 1940-1960,” Dorothy Chandler Pavilion, L.A., 6 p.m. (310) 656-4500.