Goby Lake that the diversity of species in the lake is greatly reduced from the nearby lagoon. The golden jellyfish "Mastigias" cf. "papua nakamurai" and possibly other species in the lake have evolved to be substantially different from their close relatives living in the nearby lagoons. The lake is rich with several species of fish, including goby, giving to lake its name. The deepest - north-eastern - part of Goby Lake is stratified into two layers, an oxygenated upper layer (mixolimnion) and a lower anoxic layer (monimolimnion). The oxygen concentration in the lake declines from about 6 mg/l at the surface to
Sphinx blenny mating, the blennies form distinct pairs, and the females lay up to 7000 eggs in a sitting, which are then guarded in burrows by the males. Males are known to cannibalize dead eggs to prevent infection spread amongst the healthy eggs, although in smaller broods they have also been reported consuming living eggs. It is believed that this is due to limited feeding opportunities for the males during breeding, as a result of their restriction to the nests. FishBase considers the blennies to be of Low Vulnerability, with a reproductive doubling time of less than 15 months. Sphinx blenny The