Sunfish

The Travel & Living Channel is introducing an aquarium. There's a baby sunfish, a strange looking fish. Because the sunfish is not seen often, scientists don't know it much.  They only know sunfish fry looks just like ordinary fish. But as it grows up, it begins to transform to look like cut in half, and it can grow up to 4 meters long and weighs 2 tons. This is huge. What if the baby sunfish in aquarium grows to that size?