In order to get the best car deal, buy a car toward the end of the year, as in October, November or December, said Benjamin K. Glaser, features editor for DealNews.com, a website devoted to coupons and deals across the web. However, end-of-model year doesn't always mean the end of the calendar year.
Nordgreen said that the behavioural differences they found in response to uncomfortable temperatures showed that fish feel both reflexive and cognitive pain. The experiment shows that fish do not only respond to painful stimuli with reflexes, but change their behavior also after the event, Nordgreen said.
Interestingly enough, not all fish possess a swim bladder, most notably sharks and rays. Symptoms. 1  Fish sinks to the bottom, struggles to rise up. 2  Fish floats to the top, often upside-down. 3  Swims with tail higher than head (Note: this is normal in headstanders). 4  Swollen belly. 5  Fish may have curved spine.lthough most commonly seen in Goldfish and Bettas, it can strike virtually any species of fish. In this disorder, the swim bladder does not function normally due to disease, physical defects, or mechanical / environmental factors.