What is considered to be the largest organism on planet earth? (Hint it lives near Lake Fish in Utah)

Pando (Latin: "I spread") is a quaking aspen tree growing in the Fishlake National Forest, south-central Utah.

It takes up 108 acres (43.6 ha) and weighs about 6,000 tonnes (6M kg), so is the heaviest known organism.

Genetic testing shows that all these trees (40,000 stems/trunks) are part of a single living organism with an interconnected root system. It is estimated to be several thousand years old, possibly as much as 14,000 years.

https://wiki2.org/en/Pando_(tree)+Newton

The largest single living organism based on area is a specimen of Posidonia australis seagrass (aka Poseidon's ribbon weed) located in Shark Bay off Western Australia, covering approximately 200 square kilometres (77 square miles) - equivalent to around 28,000 soccer fields or more than 450 times bigger than Vatican City, the world's smallest country. The superlative seagrass meadow was described in a paper published in Proceedings of the Royal Society B on 1 June 2022.

This claims the title of largest organism from a specimen of Armillaria ostoya honey mushroom - known colloquially as the "Humongous Fungus" - growing in the Malheur National Forest of Oregon, USA, which occupies 965 ha (2,385 acres). It retains its title as the world's largest fungus.

https://www.guinnessworldrecords.com/world-records/606952-largest-living-organism