Coloured fish darted hither and thither (=backwards and forwards).hitherhith‧er /ˈhɪðə $ -ər/ adverb old use 
Coloured fish darted hither and thither (=backwards and forwards).
WORD ORIGINhither
Origin:
Old English hiderEXAMPLES FROM THE CORPUS
- Art thou come hither, Friend, to make thy light shine before men or women?
- Autumn is blown hither and thither by an ever-changing tempestuous wind.
- The furrows look like a herd of giants have been plowing hither and yon through the snow.
- True, it would suit her very well just now to be darting hither and thither between Hertford and York.
- We found ourselves spending an inordinate amount of time in the chariot, chasing hither and yon.
COLLOCATIONS FROM THE ENTRY Coloured fish darted hither and thither (=backwards and forwards).
here: Coloured fish darted hither and thither (=backwards and forwards). Coloured fish darted hither and thither (=backwards and forwards).