Where to forage sea urchins & mussels in San Diego?

[alfsteur]

Hi y'all... unrelated to kayak fishing but recently I've been watching Outdoor Chef Life on Youtube, and Taku (host) has made foraging for sea urchins & mussels from the coastline look so easy.

Any recommendations where I can find sea urchins & mussels in San Diego during low tide?

Cheers, Alfred