On Saturday, we went straight west from Pt Loma in search of migrating gray whales. We didn't manage to find any (neither did anyone else, apparently), but we did find a large pod of common dolphins.
More photos: http://underpressurephoto.com/Animals/Common-dolphins-off-Pt-Loma/
We met up with a small group that was heading towards the larger pod and slowed down to let them swim with us. After we met up with the larger pod, various groups would swim with the boat and then swim off.
The boat was surrounded for probably a half mile in any direction by dolphins, leaping out of the water.
After turning around and speeding back up, we had some that followed the boat, surfing and leaping out of the wake.
Short video of the dolphins playing at the bow of the boat: