Largest Cephalopods by Length

About This Dataset

The largest cephalopods - squid and octopuses - by maximum total length including tentacles, in metres. The giant squid is the longest at around 13 metres, though the colossal squid is bulkier and heavier despite being shorter.

✨ AI Insight

The giant squid (13 m) is the longest cephalopod, its extraordinary length driven mostly by two elongated feeding tentacles rather than body bulk. The colossal squid (≈6 m) is less than half as long but far heavier and more robustly built, making it the largest by mass - a reminder that length and weight tell different stories. The giant Pacific octopus (5 m) is the largest octopus, though octopuses lack the long tentacles that inflate squid measurements. The Humboldt squid (1.5 m) and common octopus (1.3 m) trail well behind. The chart captures how these largest invertebrates on Earth remain among the ocean's most mysterious animals, with the biggest specimens known largely from carcasses washed ashore or found in the stomachs of sperm whales.

Source: Natural History Museum / Britannica

Key Findings

Auto-computed highlights from this dataset

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Giant squid leads with 13 in All Time.

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Average value in All Time: 5 · median: 5.

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Gap in All Time: Giant squid is 10× larger than Common octopus.