The swordfish is a blue circle with a traingular nose , 2 fins a traingular dorsal fin on it and a tail.
Press W to Charge. Like the Rhino and Muskox, the Swordfish can charge very fast, but cannot control the charge until halfway through it. Despite the Swordfish's Charge ability, the Swordfish is not equivalent to the Rhino; instead, the Swordfish is equivalent to the Bear.
Your charge ability shouldn't be messed around with. Use it to close the gap between prey, and try to do as much damage as possible while they're stunned from the charge attack.
Be especially careful when using your charge ability against a Kraken to bite its tail. The Kraken could end up using their ability to pull you in, and could use your lack-of-ability to turn against you, making you free lunch. Don't charge at it. Instead, tail-bite it (optional) and run away. If you get caught in a whirlpool, use it to escape.
However, you can still use your charge ability to bite animals like the Dragon and the Black Dragon. To do this, go into a whirlpool and when a Dragon, Black Dragon or other high-tiered animals get closer get out of the whirlpool and charge! You have time to ran away as well when it's stunned.
As prey to the Swordfish, don't attempt to try to overlook the charge attack by purposely taking it as if you can avoid it. When the Swordfish starts to charge at you which you can tell by the changed visuals and the sudden burst of speed, dive immediately. If properly timed, you can avoid the Swordfish, and use the diving air to retreat to a Whirlpool.