What temperature do various living beings freeze in?

Intercellular fluid of animals is isotonic with cell contents. Intercellular fluid of plants is slightly hypotonic: the cell walls are rigid, so they do not explode and for some reason having higher pressure inside cells is advantageous (perhaps just to avoid the reverse situation, which is fatal to plant cells).

This doesn't create a large different in intecellular fluid tonicity: blood is isotonic with ~0.9% NaCl in water (by weight)[1] and people seem to claim that intercellular fluid in plants is sometimes isotonic with ~1.0% NaCl[2]. I don't know if the cytoplasm tonicity differs to compensate, if the hypotonicity of intercellular fluid is small, or if I'm missing something else.

Anyway, this suggests that both blood and plants should freeze at (no more than) ~-0.6degC -- I expect that any salts that have no sodium nor chloride ions will push it down even further.

[1] https://www.medicine.mcgill.ca/physio/vlab/bloodlab/eryfrag1_n.htm
[2] https://sci-hub.se/10.2307/4447112
[3] https://en.wikipedia.org/wiki/Saline_water#Properties