A large proportion of bacteria isolated from the intertidal zone could grow in higher salt concentrations than found in seawater, and some could grow in saturated or near-saturated NaCl. Half the bacteria isolated could grow in media very low (0.06%) in NaCl; most of the Gram-positive organisms belonged to this group. There was no correlation between pigmentation and salt tolerance.
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Forsyth et al. (1971) studied this question.