A bigfin squid can hold its arms and tentacles at sharp bends while extremely long, thin sections trail below. Seen by a deep-sea camera, it looks almost like a suspended collection of threads.
These are Magnapinna, the deep-sea bigfin squid. They are different from bigfin reef squid, which belong to another group and live in much shallower water.
A body dwarfed by its appendages
NOAA Ocean Exploration's 2021 account describes large fins, eight arms, and two tentacles. The elbow-like angles help create the animal's distinctive posture.
Some recorded animals exceed six meters in total length, but most of that measurement is the extended arms and tentacles, rather than a giant muscular body.
A photograph without scale can be misleading. The proportions are the important surprise: a relatively small body above very long appendages.
What are those filaments doing?
Scientists think the tiny suckers along the appendages may capture prey that comes into contact with them. Exactly how the animals use them remains uncertain.
That uncertainty belongs in the story. A brief sighting can reveal posture and movement without explaining an animal's complete feeding routine.
That gap between a striking image and a complete explanation is part of what makes deep-sea research so compelling.
A creature revealed by exploration
NOAA's more recent deep-ocean overview reports observations from more than 6,200 meters below the surface.
Remote vehicles make such encounters possible. Lights and cameras reveal an animal in a place people cannot visit without specialized technology.
Wonder without a complete answer
Rarely filmed does not automatically mean rare in nature. The deep ocean is vast, and observations remain limited.
Each genuine encounter adds information about a poorly understood group. Protecting the ocean also means learning what is there before assuming we know its needs.
The bigfin squid's most remarkable quality may be how clearly it shows the boundary of our knowledge: a real animal on camera, with much of its life still out of view.
Photo credits
Featured image: Magnapinna sp..jpg — Nikivas; Public domain.
Body image 1: LongArmSquid.jpg — NOAA; Public domain.
Body image 2: Magnapinna sp. - Expl8176.jpg — NOAA Photo Library; CC BY 2.0.
Images supplied at web display size where available.