Studies were made on salinity tolerance and acclimatization of 13 economically important
red, brown and green algae at different salinities ranging from 5 to 55%. Caulerpa rocemosa
degenerated after 3 days in all these salinities. Hypnea valentiae tolerated a wide saliniiy
range of 15 to 45% and Gracilaria crassa and Acanthophora spicifera from 15 to 55%.
All other algae tolerated only 25 and 35%. Experiments conducted on salinity
acclimatization showed that A.spicifera could be acclimatized at the salinities from 55 to
15% and all other algae from 55 to 25% except C. racemosa
