Before you head to the San Clemente Pier to attend Sunday’s 25th annual San Clemente Seafest, here are some things to know:

What it is: Expect a chowder cook-off on the pier, a youth surf contest, an oceanfront arts and crafts exhibit, a business expo and more.

For kids: Activities will include a 10 a.m. hoops contest, an 11 a.m. Diaper Derby, a noon bubble-gum contest, a 1 p.m. jump-rope contest and a 2 p.m. tortilla toss.

Bring your camera: A Coast Guard helicopter search-and-rescue demonstration is set for 2 p.m. Watch from the pier.

Chowder cook-off: Fifteen teams – eight of them restaurants – will be serving chowders on the pier while seeking your vote as People’s Choice and trying to impress a judging panel.

Hours: Public tasting will be from 9:30 a.m. to about 1:30 p.m. Taste tickets are $6 for five chowders. Awards are at 3 p.m.

Semper fi: The 2nd Battalion, 4th Marines, who won the judges’ award as top nonrestaurant chowder last year, will be back seeking your ooh-rah, as will the San Clemente Journal, last year’s People’s Choice. Also returning is last year’s premier restaurant, Beach Garden Cafe.

Restaurant teams: Beach Garden Cafe, New England chowder; Bella Collina Towne & Golf Club, crab chowder; Sundried Tomato, teamed with Conrad Real Estate, New England chowder; Fisherman’s, white and red chowder; Saddleback Memorial Medical Center San Clemente, Manhattan chowder; Sunsets at the Pier, Hawaiian chowder; Tommy’s Restaurant, teamed with the Kiwanis Club, Boston-style “Volunteer” chowder.

Other teams: Don Kunze’s “Gadfly” chowder; Fortun Foods’ “Ultimate3” clam chowder; Fortun Foods’ smoked-salmon chowder; Re/Max Coastal Homes’ Hawaiian…

Read Online: Chowder and more on menu for San Clemente Seafest