Largest and heaviest animals
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The largest extant animal, as well as the largest animal to ever exist, is the blue whale. The maximum recorded weight was 190 tonnes for a specimen measuring 27.6 metres, whereas longer ones, up to 3
Infographic showing the size of marine megafauna
The blue whale is the heaviest living animal.
Dimetrodon fossil
The saltwater crocodile is the largest living reptile.
Lion's mane jellyfish
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The lion's mane jellyfish is one of the largest known species of jellyfish. Its range is confined to cold, boreal waters of the Arctic, northern Atlantic, and northern Pacific Oceans. It is common in
Largest and heaviest animals
…been recorded but not weighed. It is estimated that this individual could have a mass of 250 tonnes or more. The longest non-colonial animal is the lion's mane jellyfish (120 ft, 36.6 m). While controversial, estimates for the weight of the sauropod Bruhathkayosaurus suggest it was around 110–170 tons, with the highest…
Lion's mane jellyfish in Gullmarn fjord at Sämstad 7
Lion's mane jellyfish ephyrae form between two medusas.
Lion's mane jellyfish capturing three moon jellyfishes
Lion's mane jellyfish with full threads visible