Definition of theory. plural. theories. 1 : the analysis of a set of facts in their relation to one another. 2 : abstract thought : speculation. 3 : the general or abstract principles of a body of fact, a science, or an art music theory.
Studies have also shown that those Betta Fish which live in larger tanks will probably live much longer than those who are cooped up in smaller tanks. In fact, if you are purchasing any tank you should always purchase the largest that you can both afford and fit into your room. This is going to benefit all of your fish. Hopefully this has been of some use to you and provide at least a couple of answers as to how long does a betta fish live.
Meet the Casper Fish. The Casper fish, a transparent zebra fish (Danio), was developed at the Childrenâs Hospital Boston for use in cancer research. Casper fish are the result of a cross between 2 mutant zebra fish, nacre and roy, that produce offspring with transparent skin and scales.These transparent tissues allow scientists to see how cancerous cells spread through the fishâs body as it grows and develops.arolina currently offers 2 kits in 2 versions each for the science classroom that feature adult Casper and zebra fish: the Casper Fish Observation Kits, recommended for students in grades Kâ4, and the Anatomy and Physiology of Casper Fish Kits, recommended for students in grades 5â12.