Jam Sandwich GobyValenciennea helsdingenii Care: Intermediate Diet: Carnivorous Light: Medium Place of origin: Western Indian Ocean Temperature: Tropical: 24 28 deg C (75 82 deg F) Water Parameters: SG: 1. 020 1. 025, pH: 8. 1 8. 4 Jam Sandwich Goby This is a bottom dwelling, burrowing species which means that deep substrate and a decent refugium are imperative. They are also sand sifters which draw sand in through the mouth to feed on and organisms living in the