site          sitenum  datetime             Group           lat           lon          
site258       258      2015-01-01T05:29:00  Silverfish      -77.70288778  165.4081054  
site258       258      2015-01-01T05:29:00  LargeFish       -77.70300861  165.412975   
site258       258      2015-01-01T05:29:00  Krill           -77.70292171  165.4117929  
site258       258      2015-01-01T05:29:00  WeakScatterers  -77.70318638  165.4103688