Upper references, not normal adults
The comparison tool uses documented, reported or research-based upper length references. A record animal can be dramatically larger than a common adult. Length and weight may also come from different individuals, so they should not be combined into a single imaginary specimen.
Weight is especially slippery
Large sharks are rarely weighed whole. Some values are recorded catches; others are rounded estimates. Fossil sharks are harder still because cartilage usually does not fossilize. When a defensible mass is unavailable, the table says “Not reliably reconstructed.”
Bite force is force—not PSI
TuffShark reports newtons when a traceable study provides a value. Pressure in PSI depends on contact area, tooth position and material, so an unsupported PSI number is not interchangeable with bite force. “Modeled” means calculated from anatomy and mechanics; it does not mean a sensor was placed in a living animal’s mouth.
The three reference objects
The visual scale uses an adult human at 1.8 m and about 80 kg, a city bus at 12 m and about 12,000 kg, and a blue whale at 24 m and about 100,000 kg. These are deliberately rounded visual references. Bus models and individual whales vary.
Fossil caution
Megalodon and other extinct animals are reconstructed from teeth, vertebrae or incomplete skeletons. Different analogues can produce different body shapes and masses. We label those numbers as estimates and avoid filling missing values with guesswork.