Sometimes I doodle just by dotting with a fine tip fiber pen. Usually with inconsequential results, but sometimes it works well. This cormorant was drawn from memory after a visit to a lake. The dotting allows you to correct it as you go along. The red seals just set it off.
This shark was more considered, based on a couple of photographs. I used a grey pen for the water, which worked better than I had hoped for. This was a birthday card for a fishing son.