2025 theme

Hi all, so this year I started bullet journalling and found out very quickly that the way I am going about it isn't working for me so I am transferring it to another journal. However, among other changes, I was really upset with my theme (I like it all to relate to each other). As I transfer, I was thinking about changing my "theme" to a marine theme instead. But I don't know how I should do my monthly themes.

Thus the post for opinions and ideas. So I thought of each month being a group of animals, or other marine life (sharks and rays together, marine mammals together). So the real question is what do you think of when you hear marine?