What shark

[lavish quest]

The shark is the one that eats you if you’re in the water by the pirate ship

It doesn’t appear all the time, but I believe you have to jump from the ship’s plank into the water and just stay there

[lavish quest]

You can only trigger it in private codes

[rigid jewel]

No

[lavish quest]

You’re right, but I’ve rarely seen it in public codes. Maybe it was a bug before

[rigid jewel]

Nope not a bug. If you stay too long in water he will kill you