60-80 harbor seals hauled out during a monitoring session prior to the scheduled seal walk. Just before we were ready to document the haulout with photos, a single-engine propeller plane flew south of the haulout area just over the ocean. The moment these seals heard this plane in the distance, all of them jumped into the water. Once again, this behavior was most-likely the results of prior harassment by the same aircraft. 16 harbor seals retuned to the sandbar 25 miniutes later. 1.5 hours later, 6 harbor seals were eventually found swimming near the near-shore rocky haulout area during our seal walk after 25 minutes after we arrive