- There are more species of fish than all the species of amphibians, reptiles, birds and mammals combined.
- 40% of all fish species inhabit fresh water, yet less than .01% of the earth's water is fresh water.
- The spotted climbing perch is able to absorb oxygen from the air and will crawl overland using its strong pectoral fins.
- Some fish like sharks don't posses an air bladder to help keep them afloat and must either swim continually or rest on the bottom.