TheyвЂ™re adept at this because they can undulate the fin on their bellies. EelsД®els are the most famous for being able to swim backwards as well as it does forwards. According to the Journal of the Royal Society, the inclusion of certain fins, like anal and dorsal ones, give them the ability to do this with great ease. However, there are a few species of fish that do swim rearwards quite well. There are no fishes that can only swim backwards. Plus, fish that have a vertical pattern of travel, like shrimp fish, seahorses and razorfish donвЂ™t swim backwards simply because of their natural direction of propulsion. No one has seen or recorded certain large fish like marlin, arowana and tuna swimming in reverse. There are debates on whether other types of fish can swim backwards or not. Also, they use gravity to sink back somewhat, but they arenвЂ™t swimming backwards. Because the muscles relax along with forward motion against the water current, they will appear to go back a little bit. If you see a shark backup, itвЂ™s most often due to stopping from forward momentum. Their gills and scales, along with its overall build, limit rearward movement. Sharks canвЂ™t swim backwards because of how their skeletons are cartilaginous combined with the fact that their pectoral fins canвЂ™t curve upward.

The main reason behind their lack of ability is due to biological design. The most famous of these is the shark, but there are others too. There are very few fish that canвЂ™t swim backwards. Can fish swim backwards for long periods of time?.

Can sharks swim backwards