Sea puss is a slang term that refers to a jellyfish. However, this term is not widely used, and there are many other synonyms for jellyfish that are more commonly used. Some of the most common synonyms include sea nettle, stinger, box jellyfish, and bluebottle. Other lesser-known synonyms include medusa, Portuguese man-of-war, tentacled serpent, and sea wasp. Each of these synonyms has a unique description of the jellyfish's characteristics, such as its color, shape, and venomous properties. Overall, although sea puss is a fun and somewhat quirky term, there are many more commonly used synonyms for jellyfish that are more appropriate for everyday use.