You could look at it directly as a presentation and discuss the different locations and activities being shown in each of the photos.
You could print off and laminate the photos to make an interesting, eye-catching display about oceans.
The students could also take the laminated photos and sort them into different rich ocean scenes and activities. The students can then discuss how many different ways we use the ocean.
The photos could also be used as prompts for creative writing, factual writing or descriptive writing.