Micromorphological Observation of the Anterior Gut of Sulawesi Medaka Fish (Oryzias celebensis)

Fish medaka (Oryzias sp) is a fish that has several advantages as an experimental animal that is easy to nurseries, the reproductive cycle is short (maturation initial 2 months), embryos are transparent, the generation time is short, the genome size is small and has had a construction of transgenic (Naruse et al., 1985; Denny et al., 1998; Ishikawa, 2000). Some biological information to the molecular systematics of medaka fish, especially the Japanese medaka fish (Oryzias latipes) is also widely found (Andriani and Hassan, 2013; Takehana et al., 2015). Needs medaka fish as an animal model has made researchers using medaka fish as animals test to create a wide variety of strains of medaka fish Oryzias latipes.