A grasshopper is not a unicellular organism. In fact, it is considered to be a multicellular organism as are eels, duckweed, and crayfish.
It is multi celled.
Single
Single-cell
Bacteria are single-celled organisms
multi celled
They are multi-cellular.
multi celled of coures
multi celled
Onions are multicellular, but this term refers to the entire organism - you cannot call a single onion cell a "multi cell".
A fungi is a multi-cell but can be a single cell
Turtles are definitely multi-celled. Single cell organisms are microorganisms such as bacteria and the protozoans.
Single-cell organisms, like bacteria and yeast, are composed of a single cell that can carry out all the functions necessary for survival. In contrast, multi-cellular organisms, like plants and animals, are made up of more than one cell that are specialized to perform different functions. Multi-cellular organisms have a higher level of complexity and organization compared to single-cell organisms.