amphibians suitable for a tropical tank

[fish freak]

Hi, i have a 300 litre tropical sand based fish tank which has a 12 inch oscar fish in, im looking to put something in there like a crab, newt, frog etc but cant seem to find any information about the types of species to put in there, i dont want to lower the water level so they can get out. are there any type of species that can stay completely submerged under water?
cheers kayleigh

 

[alLexX]

well,there are a couple kinds of frogs that dont need land access...but benifit from not getting oscar access

 

[fish freak]

cheers do you know the names/species of these frogs, is there any type of crabs/crayfish that also dont need access to dry land?

 

[alLexX]

african dwarf frogs and african clawed frogs,but both would be eaten by the oscar.and the oscar would eat any crab or crayfish that didnt eat him first.

 

[fish freak]

so basically there is nothing i can have in my tank like a newt, frog, snail, crab, crayfish etc

 

[alLexX]

you might be okay with a snail,but not amphibians and crustacaens.

 

[fish freak]

thanks for your help

 

[alLexX]

no problem