Problems with equating thermal preference with 'emotional fever' and sentience: comment on 'Fish can show emotional fever: stress-induced hyperthermia in zebrafish' by Rey et al. (2015). - Key B; Arlinghaus R; Browman HI; Cooke SJ; Cowx IG; Diggles BK; Rose JD; Sawynok W; Schwab A; Skiftesvik AB; Stevens ED; Watson CA (Proceedings. Biological sciences, 2017)