The annual "Marine Science Day" at the Virginia Institute of Marine Science will be Saturday from 10 a.m. to 3 p.m. at the campus on the York River in Gloucester Point.

The public is welcome to the open house, said a VIMS spokeswoman. Visitors can tour the oyster hatchery, learn about deep sea fish that glow in the dark and meet scientists.

This year's theme is bioluminescence and research projects around the globe. VIMS will have exhibits, mini-lectures, marsh tours, activities for children and a seafood cooking demonstration.

Visitors will also get an up-close look at jellyfish, crabs, seagrass and other critters that live in the mud. Other topics will be marine debris, water quality and fish tagging programs.

A marine life costume contest will take place at 11 a.m. Parking and admission are free.

Information: www.vims.edu or 804-684-7846.