Piraneer eggs are covered in a water resistant fur that helps keep the egg warm despite the cool sea air and constant spray of salt water aboard Piraneer ships.
Piraneers are a nomadic species that live the entirety of their lives aboard ships out on the ocean. The only real interactions land-based species have with Piraneers is when they dock their ships to trade or when a Piraneer ship attacks a unfriendly ships that travels too close to their territory. Piraneers mainly trade for fruits, vegetables, and wood to keep their ships in repair. It's been noted by those that do lots of trading with Piraneers that they never seem to trade for as many goods as the known population would need, leading to many theories as to why that is, everything from secret unknown islands only known to the Piraneer or to a great floating Piraneer city where food is grown.
It is rumored that the Tidnab thieves guild works with Piraneer captains as part of the guild's smuggling business.