Thumbnail ideas for oceanology theme pattern, I favor a deep diver in it.

An outline of the stingray creature was used in Photoshop to develop the pattern.

Here is the outline for the deep sea diver with the horsefish. The bubbles resulting from the oxygen supply for the diver would be added towards the final preparation of the pattern. 

The stingray painted in Photoshop on a transparent background to be employed in the pattern design.

Here is a complete image view of the pattern.

In the final offset formation, this picture conveys the spacing of the pattern.

When scaled in size this is final pattern design with oceanology theme.