underwater expansion

+fins potions- raw fish is the ingredient and are like potions of water breathing but can only be reversed by eating meat (not fish). +underwater villages! mermaids inhabit these and have diamond blocks and will pursue you if you steal their treasure. +kraken! an underwater boss. +underwater coral caves! they have coral and alomite. alomite has natural strength of iron but does more damage or more armor than netherite underwater.