Small Tiny Limpet.

A small tiny limpet
clung to a rock
on the edge of an angry sea.

As he clung to the rock
in the sea by the dock thought
"Is this all there is for me?"

He was feeling quite low
and moved ever so slow
to a spot on the rock that was new.

As he slupped and he sifted
his spirits were lifted
Cos he found where the algae grew.

As he ate and he ate
he began to feel great
and thought:
"I am one lucky limpet mucker"

"Its my place on this rock,
In the sea by the dock,
cos lets face it I'm just a big sucker"
 

Changed a word 'cos it was naughty...can you tell which one?