Chains in the water makes life much harder because they cannot be destroyed.
Getting 3 stars is very hard.
Send the Lazer bird over everything, redirect him next to the Fat Pig and redirect him into the wooden planks below, releasing the underwater TNT. Use Ice bird to blast the TNT next to the Fat Pig, then finish the level with Terence straight ahead.
Send the Lazer Bird over anything, redirect him to the rightmost blocks of the leftmost structure and destroy the wood plank next to this block (as in the left picture) , then the leftmost structure slide to the water and the leftmost chain in underwater should fall to the planet. Launch the Ice bird above the ruin of the leftmost structure to freeze the Fat Pig and demolish the TNT which over water. And launch Terence to crush the bubbled pig.