"Sea-puss" is a colloquial term used to describe a jellyfish. However, there are numerous synonyms for the word that can be used to add variety and interest to your writing. Some examples include "jellyfish", "stinger", "medusa", "sea nettle", "tentacled creature", or "gelatinous organism". Each of these synonyms provides a unique and descriptive term that can be used to describe the sea creature in question. Whether you are writing about the ocean, marine biology, or simply describing a scene, incorporating these synonyms for "sea-puss" will add depth and nuance to your writing.