Something that somebody probably has already come up with ...

OK, so I was getting ready for our action-packed fun-filled Fathers Day activities, and my brain (admittedly, running a bit on sleepdep) was spinning stuff out ... like this little snippet:

It's an eel
with big teeth
and it hides
in the reef ...

dat's a Moray!

However, after my "Huge Manatee" experience, I fear that somebody else has no doubt not only come up with this previously, but probably recorded it! I am definitely having a "crisis of confidence" as a Wit At Large.