The Ramora is a silver fish native to the Indian Ocean that has strong magical power to anchor ships in place. The Ramora is an immensely powerful magical fish in the world of magic, and is a guardian of the seafarers whether they are muggle or magical. The International Confederation of Wizards enforce anti-poaching laws to protect this creature from illegal wizard capture.
The penalty for taking Ramora eggs is even higher than the fish itself. You will find yourself with a hefty fine and possible incarceration. The heart, blood and tail of the Ramora are all classed A - Non tradeable goods, and anyone found in possession of such items will also incur a fine. So it's best to leave them alone.