The hindbrain or rhombencephalon is the caudal-most neuromere. It lies posterior to the midbrain and is formed by the cerebellum (anterodorsally) and the medulla oblongata (ventrocaudaly). For a great overview of hindbrain development in the zebrafish read:
Moens, C.B. and Prince, V.E. (2002) Constructing the hindbrain: Insights from the zebrafish. Developmental dynamics: 224(1):1-17.
You can explore the different regions of the zebrafish hindbrain by selecting a region in the list below.

Schematic showing the regions that comprise the hindbrain using the anatomical segmentation of 3 day old zebrafish larval brain by Thomas Müller, Olaf Ronneberger, Wolfgang Driever and colleagues. For details see Ronneberger et al., Nat. Meth. 2012 and http://vibez.informatik.uni-freiburg.de
Abbreviations: Ce, cerebellar plate; MO, medulla oblongata; Va, valvula cerebelli.
You can explore the different regions of the zebrafish hindbrain by selecting a region in the list below.