Fishing-themed slots can feel as calm as a lake or as lively as open water....

https://xeon-wiki.win/index.php/What_Makes_a_Slot_Theme_Feel_Coherent_Instead_of_Random%3F

Fishing-themed slots can feel as calm as a lake or as lively as open water. Look for familiar touches like a rod or boat, while the fisherman’s easygoing or cheeky personality gives each game its own flavor.