Trout Brain

See here for brain labelling: http://academic.emporia.edu/sievertl/verstruc/Tbrain.htm
An excerpt taken from “Environmental effects on fish neural plasticity and cognition” by Ebbesson, L. and Braithwaite, V.
Most fishes experiencing challenging environments are able to adjust and adapt their physiology and behaviour to help them cope more effectively. Much of this flexibility is supported and influenced by cognition and neural plasticity.
The brains of teleosts, such as trout, share many of the same subdivisions seen in most vertebrates: a brainstem, the cerebellum, the mesencephalon, a pair of optic lobes, the paired cerebral hemispheres of the telencephalon (forebrain) and the associated olfactory bulbs (Northcutt, 2002).
The mismatch between the structural position of the fish amygdala and hippocampus homologues appears to be a result of different developmental processes that produce fish and mammalian brains (Salas et al., 2006). During early embryonic development, the fish