On Bob's Burgers Season 4 Episode 18, Gene, Louise, and Tina find a seaweed-covered object at the beach that turns out to be a large hunk of Ambergris.
And it also turns out to be VERY valuable. And illegal.
Upon learning of this news, Louise tries to cheat Gene and Tina out of the profit she hopes to make by selling the treasure on the black market.
Elsewhere, Bob and Linda deal with their crazy landlord... who is building them a new bathroom.
Watch Bob's Burgers online to see how this all unfolded: