due to having no bones and being a rather squishy being all non-magical damage taken is halved, this also allows you to fit into ridiculously small spaces

you have the ability to change the coloration of your skin, allowing you to have advantage on stealth rolls due to blending into your surroundings with your camouflage

you can spray ink in order to blind an opponent

you can attack with four light weapons or two heavy weapons (alternatively one heavy weapon with double damage) for each attack action. you may also instead make 10 unarmed attacks

you can take the form of a tiny octopus

due to being somebody aquatic you get advantage on all physical skill checks when you are in water