Scientists believe that these creatures have been around even before the dinosaurs. What’s really interesting is that they are not considered a fish at all because they have no eyes, ears, nose, bones, a spine, a brain, head, or even a heart! Their body is made out of 95% water. If they’re out of the water, they are nothing but one big blob! Talk about their tentacles, they can be as small as 25 mm, but can be as long as two basketball courts, or about 61 meters! Their diet is small fish and zooplanktons.
Other species of jellyfish are among the most common jellyfish predators, some of which specialize in jellies. Other predators include tuna, shark, swordfish, sea turtles, and at least one species of Pacific salmon.