stenotopic - ability to adapt to only narrow or stilted range of environment.
eurytopic - ability to adapt to wider range of environment.
stenobhatic - ability to adapt to only narrow range of depth of water (and hence light)
eurybhatic - ability to adapt to wider range of depth of water (and hence light)
steno - connected with 'sten' in Sanskrit - 'to steal', 'to rob', 'to stint'.
eury - connected with 'ayur' in Sanskrit - 'to prolong', 'to widen', 'long', 'wide'.
topic - connected with word 'tropic' and 'taap' in Sanskrit - means Temprature, Heat, and in loose terms Environment.
bhatic - connected with Sanskrit 'light', 'to shine', and indirectly with depths of water as where else light should be interpreted as with wider or narrow range of light when the word is combined with prefixes 'steno' and 'eury'.