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
Extreme penis elongation has been observed in the deep water squid "Onykia ingens". When erect, the penis may be as long as the mantle, head, and arms combined (Arkhipkin & Laptikhovsky, 2010:299; Walker, 2010). As such, deep water squids have the greatest known penis length relative to body size of all mobile animals, second in the entire animal kingdom only to certain sessile barnacles (Arkhipkin & Laptikhovsky, 2010:300).