Fish could have emotions and consciousness

They have a brain, react to food & threats, why would this not be expected?

The reason given for assuming fish are without emotions or consciousness doesn't seem scientific to me. Just because this temperature change accompanies emotion & consciousness in some kinds of animals doesn't mean it is necessary in all forms of life.

http://www.eurekalert.org/pub_releases/2015-11/uadb-fch113015.php

Public Release: 30-Nov-2015
Fish could have emotions and consciousness
Universitat Autonoma de Barcelona

Researchers from the Universitat Autònoma de Barcelona (UAB), together with scientists from the universities of Stirling and Bristol (United Kingdom), have for the first time observed an increase in body temperature of between two and four degrees in zebrafish, when these are subjected to stressful situations. This phenomenon is known as emotional fever, as it is related to the emotions that animals feel in the face of an external stimulus and it has even been linked, not without some controversy, with their consciousness.

Until now emotional fever had been observed in mammals, birds and certain reptiles, but never in fish. For this reason fish have been regarded as animals without emotions or consciousness. The experiment, with 72 zebrafish, has brought this view into question.

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