Abstract Lake Laut MatiTasi Ana is located in Daeurendale Village, Landuleko Sub-District of Rote Ndao Regency East Nusa Tenggara Province. The conditions and characteristics of water habitat of this Lake  greatly affect the diversity of existing biota. Insofar, data and information about the diversity of macrozoobenthos and nekton  in this lake arestill are not  available. This study aims to identify  the diversity of macrozoobenthos and nekton   that exist  in the  lake as well as  their habitat condition parameters. The samples of data  were collected from four predetermined stations of coordinate points (1.Oemasapoka, 2.Olokama, 3.Kaluoen, 4. Lolokaslain) by using cruise method. The study found that    in this lake there exist eight species of  macrozoobenthos which include Parathelphusaconvexa, Melanoidesturricula, M. tuberculata, M. maculata, Neritaundata, Mytilusedulis, Acar squamosa, Cerastodermaglaucum. Most of those macrozoobenthos belong to Gastropod class. In addition, there are four species of nekton namely Oreochormis niloticus, O. mossambicus, Paracheirodon simulans, Channa sp. All of these nektons are found only in station 1 (Oemasapoka). It is conceivable asthe watersalinity of this station is 30 0/00 and the pH level is 9.29. Such condition allows the existence of the nektons.

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This study deals with the local names of floras and faunas living in the area of Danau Laut Mati Tasi Ana’ in Landu Sub District of Rote Regency. As language and physical nature are two inseparable entities, this study emphasizes that maintaining a language, to some extent, is equal to maintaining the existence of nature and vice versa. Documenting the names of floras and faunas in Landu Dialect of Rote Language and describing their meaning are two main purposes of this study. The underlying principle of it is to maintain the languge from being endangered. The main question that drives this study is to what semantic domain do the local names of floras and faunas belong to? In order to obtain data a Field observation was conducted. The photos of floras and faunas were taken. A native speaker of Landu dialect of Roti Languge who lives nearby the Lake wa consulted in order to get the local names of the floras and faunas. The data analysis follows the model presented by Suweta (2013). The data show that the floras and faunas living in the area of Danau Laut Mati Tasi Ana’ belong to four semantic domains i.e the domain of food for human being, food for animal, herb, and building material.