The Moon is female or bisexual, the Sun is male
Some creature or creatures regularly (sunrise and sunset, summer and winter, lunar phases) or irregularly (solar and lunar eclipses, eschatological events) attack the luminaries or shade their light
During an eclipse or at other circumstances the Sun or the Moon are attacked by a predator animal (a bear, a feline, a canine, a racoon)
A supernatural person comes to people who fish. They bury him on the beach or throw him into river or marsh. Somebody saves him. He or his father sends the flood
Magic object, device that makes hunting or fishing easy gets into possession of a person who is unable to operate it or abuses it. The device kills or injures the failure himself, other people and/or disappears
Rainbow is a reptile (usually a snake) or (more rare) a fish, or it is related to snake, to its tongue, breath, or to scorpion's tail
A man hides in a shelter. An ogre wants him to give certain parts of his body. The man gives the ogre instead parts of the body of a killed animal. The ogre does not understand the deceit, gives in response parts of his own body and dies
Killing (injuring, offending) of some cruature (usually related to water) triggers deluge
When a person or creature who lives in the upper world urinates, it rains (dew falls) on earth