Saturday - 11/22 - Seining the Lagoon at Gumbo Limbo Nature Center, 1801 N. Ocean Blvd., Boca Raton. Explore the grasses and flats of the Intracoastal Waterway behind Gumbo Limbo. Hand-held dip nets and large seine nets allow participants to catch and release a variety of fish, shrimp, crabs and marine life. Wear clothes that can get wet. No flip-flops or sandals. Sneakers or watershoes only. Ages 10 to adult, children must be accompanied by an adult. Held again 11/29 (9-10:30 am). 2-3:30 pm. $7/members, $10/non-members. Reservations: 544-8615.