This research was aimed to explain operculum movement and microanatomy skin structure of P. schlosseri with interval calculation of oxygen uptake by operculum while P. schlosseri stay on the land and undergo skin preparation to observe part of the skin and mucous cell microscopically. Sampling was conducted by using the endangered animal catching method with line transect. The observation of operculum movement was done using camera video or direct observation. The observation of skin microanatomy was done using the paraffin method and then observed under the microscope. The result of this research showed that the average interval oxygen uptake is 7.25 minutes. The result shows that mucous cell is on the skin layer of P. schlosseri found in the epidermis layer with an average range between mucous cell equal to 16.96 μm and average broad size is 73.87 μm.

1. Muhamat, “Identification of nest of Periphthalmodon Schlosseri, In area tides tidal Estuary Barito River: National seminar Semirata”, West Bogor, Indonesia: Universitas Lambung Mangkurat, 2014.
   
2. R. Tan, (2010). Giant mudskippers: Periophthalmodon schlosseri [Online]. Available: https://goo.gl/CRZE6V
   
3. T. Nurcahyatun, “Effect of giving mercury chloride against structural microanatomy gills Cyprinus fish,” Thesis, University of Negeri Semarang, Indonesia, 2007.
   
4. M. Hutomo, “Observations introduction about behavior fish Mudskipper”, Jakarta, Indonesia: Center for Research Fisheries Marine, 2010.
   
5. S. Chandra and T. K. Banerjee, “Histopathological analysis of the respiratory organs of Channa striata subjected to air exposure,”Veterinarski Arhiv, vol. 74, no. 1, pp. 37-52, 2004.
   
6. P. Hammond, Atlas’s of the World’s Strangest Animals. Singapore: Marshalls Cavendih, 2010.
   
7. P. A. R. K. Jong-Young, “Morphology and histochemistry of the skin of the Korean spined loach, Iksookimia koreensis (Cobitidae), in relation to respiration,”Folia Zool, vol. 51, no. 3, pp. 241-247, 2002.
   
8. J. Y. Park, Y. J. Lee, I. S. Kim and S. Y. Kim, “A comparative study of the regional epidermis of an amphibious mudskipper fish, Boleophthalmus pectinirostris (Gobiidae, Pisces),” Folia Zoologica-Praha–, vol. 52, no. 4, pp. 431-440, 2003.
   
9. E. Ikpegbu, U. Nlebedum, O. Nnadozie and O. Agbakwuru, “Histological observations on the dendretic organ of the farmed adult African catfish (Clarias gariepinus) from Eastern Nigeria,” Journal of Agricultural Sciences, vol. 58, no. 2, pp. 139-146, 2013. https://doi.org/10.2298/JAS1302139I
   
10. C. Calabro, M. P. Albanese, E. R. Lauriano, S. Martella and A. Licata, “Morphological, histochemical and immunohistochemical study of the gill epithelium in the abyssal teleost fish Coelorhynchus coelorhynchus,” Folia Histochem Cytobiol, vol. 43, no. 1, pp. 51-56, 2005. PMid:15871563
    
11. M. D. Powell, D. J. Speare and J. F. Burka, “Fixation of mucus on rainbow trout (Oncorhynchus mykiss Walbaum) gills for light and electron microscopy,” Journal of Fish Biology, vol. 41, no. 5, pp. 813-824, 1992. https://doi.org/10.1111/j.1095-8649.1992.tb02709.x
    
12. D. P. Chivers, B. D. Wisenden, C. J. Hindman, T. A. Michalak, R. C. Kusch, S. G. Kaminskyj and M. S. Pollock, “Epidermal ’alarm substance’cells of fishes maintained by non-alarm functions: Possible defence against pathogens, parasites and UVB radiation,” in Proceeding of the Royal Society of London B: Biological Sciences, vol. 274, no. 1625, pp. 2611-2619, 2007. PMid:17686729      PMCid:PMC2275884
    
13. G. Zaccone, B. G., Kapoor, S. Fasulo and L. Ainis, “Structural, histochemical and functional aspects of the epidermis of fishes,” Advances in Marine Biology, vol. 40, pp. 253-348, 2001. https://doi.org/10.1016/S0065-2881(01)40004-6

Muhamat, Y. Rahma, Hidayaturrahmah, H. B. Santoso and B. Setyo, “Operculum movement and microanatomy skin structure of Periophthalmodon Schlosseri in estuary of Barito river,” International Journal of Applied and Physical Sciences, vol. 3, no. 2, pp. 33-36, 2017.