This is a paid asset, but now you can download SEA MONSTER GAME ICON SET for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
SEA MONSTER GAME ICON SET v1.0
Discover the unique and well-prepared Sea Monster Game Icon Set, which has everything you need to create an exciting game project. About 48 high-quality icons are stored here, which have high-quality graphics and are designed in a universal resolution of 256×256. Among them, you can find such monsters as: jellyfish with horns, fighting hermit crabs, skeleton fish, hammer shark, electric jellyfish, moray eel, mermaid, underwater devil, octopus, mythical monsters, megalodon, three-headed turtle, hostile corals, kraken and many others monsters. Each element is made in excellent quality, which will allow you to easily integrate them into popular game engines such as Unity, GameSalad, Buildbox, GameMake.
Create an underwater world filled with sea monsters and scary quests that the player will have to overcome in order to reach the desired heights and rewards. RPG, MMO-RPG, runners, adventures, arcades, card games and more are great to sync with this set. Also, using vector graphics editor that has a sufficient number of editing tools, such as Adobe Photoshop, you can easily change this package according to your requirements. For example, add new details to the external monsters, change the size of the icons, or simply leave everything in the original.
Quantity: 48 different icons;
Graphics: 2D, Vector;
Formats: AI, EPS, PNG;
Resolution: 256×256.