Grunion Run 2024 Seal Beach. Grunion are about 5 to 7 inches long. According to the department's schedule of expected grunion runs — the next one starts this saturday and goes from 10 p.m.
There’s a short film about the grunion, a “hatching experience,” and a beach observation of grunion with a staff member. In general, these unique fish can be found during their spawning times at many beaches from the san diego area up to the san luis obispo county coast.