Ark

A man is doing a crossword and asks his wife for help.

Husband: Body of water, three letters.

Wife: Bay.

Husband: Flying insect with stinger, three letters.

Wife: Bee.

Husband: To hush someone, four letters.

Wife: shhh.

Husband: Boat Noah built, three letters.

Wife: Ark.

Husband: DOO DOO DOO DOO DOO DOO

Noah had just landed the ark.

After all the animals had disembarked he went back in to look around and there were two snakes in the corner crying. He said what's going on? I told you to go fourth and multiply. They replied but we're adders!