"The sea by kindergarterners" joke

This is a picture of an octopus. It has eight testicles.
(Kelly age 6)
Oysters' balls are called pearls.
(James age 6)
If you are surrounded by sea you are an Island. If you don't have sea
all around you, you are incontinent.
(Wayne age 7)
I think sharks are ugly and mean, and have big teeth, just like Emily
Richardson. She's not my friend no more.
(Kylie age 6)
A Dolphin breathes through an asshole on the top of its head.
(Billy age 6)
I like mermaids! . They are beautiful, and I like their shiny tails. How
do mermaids get pregnant?
(Helen age 7)
Some fish are dangerous. Jelly fish can sting. Electric eels can give
you a shock. They have to live in caves under the sea where I think
they have to plug themselves into chargers.
(Christopher age 7)
When you go swimming in the sea, it is very cold, and it makes my
willy small.
(Kevin age 6)
There are a lot of suckers in the ocean. The Mafia put them there.
(Russ age 5)