The three new gems are Bloodstone (uncommon), Moonstone(rare) and Sunstone(rare).
The new fish are Toads(common), Fairy Damsel(rare), and Luminous Salamander(uncommon).
The new plant harvestables are Wolfsbane Flower(common), Red Valerian Root(common), White Caps(common), Porcinis(common), Red Toadstools(common), Ghost Chili(rare), Glow Orbs(rare), Truffles(rare), Spotlight Mushrooms(uncommon), Mycenas(uncommon), and Mandrake Root(common).
Some of the above need to be bought at the alchemy shop as they're not available at the grocery store.