To add the Poached Sea Egg to your collection in the Roblox Egg Hunt, you will need to play It's Your Way. Make sure to use the linked game as there are multiple versions of this game on Roblox.
You will need to build a ship, then place a Special Event item there and survive until the end of the turn in possession of that item. If this is your first time playing this game, you should start with a default boat. This is perfect because it means you don't have to build anything for the event.
If you need to build something, you might want to play a few rounds to earn some gold so you can make a good boat, then open the Build menu at the bottom of the screen and start buying coins for your boat. Try to make it well balanced, and not with too much weight on one side, otherwise it will turn over.
Whether you're building a boat or using the default one, you'll need to purchase a Glorious Egg Podium. Before the start of the round, some of the boats will be randomly returned to “Potent”, which means that an egg will appear on the podium. It is your job to complete the round with an egg in your possession, and if you can, this is how you get the Poached Egg from the Sea.
If one appears on your boat, you need to protect it. Otherwise, you'll have to steal the egg from someone else. You can break a podium by holding F, it will make you grab the egg. When the build menu is closed, you'll also have access to a sword and pistol to defend yourself, but you won't be able to use them if you're holding an egg.
If you're lucky and your ship is made powerful at the start of the turn, it's a good idea to build something around the podium, so no one can see you've got the egg.
If you manage to complete the round with an egg, you will get the Poached Egg from the Sea.