Grunions spawn out of the water

Image: Twin Cities PBS

Grunions reproduce by coming completely out of the water to spawn on beaches in South California and Baja Mexico. Hundreds to thousands of grunions can be observed swimming onshore in a grunion run.

Resources:

NBC San Diego:Fish out of water - May 2018 Grunion Run

Grunion Facts and Expected Runs, CA Fish and Wildlife

Grunion Biology, Pepperdine University

Grunions (Season 1, Episode 4)

Type

Phenomena

Subject

Earth and Space Science

Life Science

NGSS Standards

Grunion runs follow the cycles of the moon, permitting classroom connections between life science and space science through the crosscutting concept of patterns.

1-ESS1-1,ESS1.A: The Universe and its Stars

MS-ESS1-1,ESS1.A: The Universe and Its Stars

Grunion reproduction process.

3-LS1-1,LS1.B: Growth and Development of Organisms

MS-LS1-4,LS1.B: Growth and Development of Organisms