I think it's a bit of a cheat to call these things single-celled. They're really lots of cells where the cells are connected by cytoplasmic bridges. https://bi

I think it's a bit of a cheat to call these things single-celled. They're really lots of cells where the cells are connected by cytoplasmic bridges. https://biology.stackexchange.com/a/28480/3871 https://biology.stackexchange.com/a/28480/3871 Sure, topologically that's the same, but biology isn't topology. There are lots of organisms like this: https://en.wikipedia.org/wiki/Coenocyte https://en.wikipedia.org/wiki/Coenocyte I don't know this species specifically, but functionally, organisms like this work much the same as multicellular organisms, with the domain round a nucleus equipped with protein synthesis machinery and other organelles running mostly independently, and coordinating with the other ones via chemical signals. It's just that the signals can move around without having to cross a cell membrane. EDIT: And if you count this as a single cell, then presumably you'll count a muscle fibre, which is also many nuclei inside a single cell membrane, in which case there are larger single cells inside your own body: https://www.jneurosci.org/content/25/37/8528 https://www.jneurosci.org/content/25/37/8528 Well, longer at least.