It's about one-tenth as heavy as The Tongue of a Blue Whale.
In other words, 404 kilograms is 0.15 times the weight of The Tongue of a Blue Whale, and the weight of The Tongue of a Blue Whale is 6.7 times that amount.(Balaenoptera musculus) (adult)
It's about eight times as heavy as an Octopus.
In other words, 404 kilograms is 8.1 times the weight of an Octopus, and the weight of an Octopus is 0.12 times that amount.(for Giant Pacific Octopus, Enteroctopus) (Adult, average)
It's about one-tenth as heavy as a Hippopotamus.
In other words, 404 kilograms is 0.108 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 9.26 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 3,000 to 4,500 kg. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about nine-and-a-half times as heavy as a Toilet.
In other words, 404 kilograms is 9.27 times the weight of a Toilet, and the weight of a Toilet is 0.108 times that amount.(KOHLER Round front sitting flush toilet, model #K-11471-0)
It's about thirteen-and-a-half times as heavy as a Dalmatian.
In other words, the weight of a Dalmatian is 0.073 times 404 kilograms.(a.k.a. Dalmatinac, a.k.a. Carriage Dog, a.k.a. Spotted Coach Dog, a.k.a. Firehouse Dog) (FCI standard; male)
It's about one-fifteenth as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 16 times 404 kilograms.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
It's about one-twentieth as heavy as an Elephant.
In other words, 404 kilograms is 0.05377 times the weight of an Elephant, and the weight of an Elephant is 18.6 times that amount.(for African bush elephant, Loxodonta africana) (Adult, bull)