On the basis of their habitat, algae can be categorized as: aquatic (planktonic, benthic, marine, freshwater, lentic, lotic), terrestrial, aerial (subaerial), lithophytic, halophytic (or euryhaline), psammon, thermophilic, cryophilic, epibiont (epiphytic, epizoic), endosymbiont (endophytic, endozoic), parasitic, calcifilic or lichenic (phycobiont).
ɔnðə bˈeɪsɪs ʌv ðɛɹ hˈæbɪtˌæt, ˈælɡiː kæn biː kˈæɾɪɡɚɹˌaɪzd æz: əkwˈæɾɪk plæŋktˈɑːnɪk, bˈɛnθɪk, mɚɹˈiːn, fɹˈɛʃwɔːɾɚ, lˈɛntɪk, lˈoʊɾɪk, tɚɹˈɛstɹɪəl, ˈɛɹɪəl sʌbˈɛɹɪəl, lˌɪθəfˈɪɾɪk, hˌeɪləfˈɪɾɪk ɔːɹ jˈuːɹɪhəlˌaɪn, sˈæmən, θˌɜːməfˈɪlɪk, kɹˌaɪəfˈɪlɪk, ˈɛpɪbɪˌɑːnt ˌɛpɪfˈɪɾɪk, ˌɛpɪzˈoʊɪk, ˈɛndoʊsˌɪmbɪˌɑːnt ˌɛndoʊfˈɪɾɪk, ˌɛndoʊzˈoʊɪk, pˌæɹəsˈɪɾɪk, kˌælsɪfˈɪlɪk ɔːɹ lɪtʃˈɛnɪk fˌaɪkoʊbɪˈɑːnt.