The 'spots' you see on the dolphins look like pox lesions which are fairly common in dolphins. It is caused by a virus that most dolphins carry but comes out when stressed. Sudden changes in temperature can cause the issue. The lesions can also be a sign of an underlying illness. The lesions that look more crater like are older lesions.
How can you help? We can't control the weather but we can keep our waters cleaner to avoid plastics and other pollution getting int o the water ways. We want the fish to be healthy and clean giving the dolphin healthy meals that support their immune system.
Please reduce, reuse and recycle. Pick up debris and trash you find along your path.
Together we can help our oceans.