Rare, fanged lancet fish discovered along NC beach: What was the deep-sea monster doing there? Lancet fish have extremely large mouths, and razor-sharp teeth. These open-water animals can grow over six feet in length. Very little is known about this elusive species, but they are similar to yellowfin tuna and swordfish in many aspects.
Did you know there is a betta gene called "Marble" that causes them to change color throughout their lifetime? If you ever see a betta with splotches of color..it might be a marble! Keep him in warm water with plenty of room to swim and you will see your fish change colors and thrive!