Question: Is it legal to fish for manta rays in California, specifically in the San Francisco Bay area?

Answer: Manta rays are generally not found off California, and since they are filter feeders, it may be difficult to persuade one to take your bait. The northernmost limit of their range in the eastern Pacific Ocean is around San Diego, where they are only spotted occasionally. However, if a manta ray were to stray farther north, then yes, it may be legally taken by hook and line off California. I suspect you instead may be referring to bat rays which are more widely distributed and caught fairly regularly on hook and line. If so, they too are legal to take.