Colossal squid
The largest recorded specimen was captured in 2007 by a New Zealand fishing boat off Antarctica. It was initially estimated to measure in length and weigh . The squid was taken back to New Zealand for scientific study. A study on the specimen later showed its actual weight was , but it only measured in total length as a result of the tentacles' shrinking "post mortem".
Cephalopod size
"Onykia robusta", previously known as "Moroteuthis robusta" (see Bolstad, 2008; 2010) and sometimes called the robust clubhook squid, has a mantle length of up to (Norman, 2000:174; Bolstad, 2008:107; Okutani, 2015b). Some older records exceed this, such as the ML reported by Verrill (1876:237) from a specimen with a total length of (excluding the ends of the tentacles, which had been destroyed). Nesis (1987:192) likewise gave a maximum mantle length of , but Roper & Jereb (2010i:364) wrote that "this old record might be in error", with the species commonly growing to ML. Glaubrecht & Salcedo-Vargas (2004:66) provided a maximum total length of .