What is the difference between killerwhale and swordfish?

Answer 1

Well first of all, there is no such thing as a spearfish. Spearfishing is a sport.

This is incorrect. There is such a thing as a Spearfish. There are several types of Spearfish, which like swordfish, are Marlin http://en.wikipedia.org/wiki/Marlin. Spearfish, like Sailfish, have really large, wavy dorsal fins (like sails), whereas Swordfish do not. Swordfish are also larger. I'm not sure the difference between Spearfish and Sailfish however, except that it is prohibited to catch and keep a Spearfish in US Federal Waters and you can keep Sailfish 63 inches or larger http://www.nmfs.noaa.gov/sfa/hms/rec_info.htm

And yes spearfishing is a method of fishing. The fish have been doing it longer than humans have, but we came up with the name.....

Answer 2

well the difference is, the swordfish has a long "nose" that stretches out in front of it. sword fish are fish and killer whales are mammals