[9] The common bobtail squid is found globally, but is abundant in the eastern Atlantic and across the Mediterranean Sea.

[13] The common bobtail squid distributional range is in the eastern Atlantic to the Mediterranean Sea spread.

[16] The abundance of the common bobtail squid depends on how far they are from northern waters and their tolerance to temperature.

The common bobtail squid possesses very little photophores which means they can only brighten up a small bit..

[31] A common bobtail's lifespan initially begins from egg to spawn, taking about 4 to 6 months.

[33][34] Newly hatched young take shelter on the bottom seafloor, searching day and night swimming freely to hunt and capture prey.

Unlike when they were newly born, over a 10-week period, they adopt a diurnal pattern where they hunt only during dusk to feed until dawn.

[36] A juvenile would launch itself towards the prey mouth forward in hopes of grabbing and devouring it on the spot.

[37] Adult common bobtail squids wait on the seafloor or nearby substrate, it will position itself for an optimal angle to allow its tentacle to be launched.

[39] Taxonomy of the sepietta species is difficult as researchers have to internally invade a specimen to identify it and conduct a comparison.

The common bobtail squid is used as a placeholder for checking general cephalopod health, cellular and molecular status because of their abundance and widespread distribution globally.

The molecular analysis of the egg clutches allows the “taxonomic and phylogenetic studies of the cephalopod species as a whole.”[40] Researchers also have used the common bobtail to test variability and mutation of cephalopods due to their widespread abundance, in where they have found the arms of the common bobtail having many anomalies.

The statolith is also used as a medium to derive information on many aspects of the cephalopod species life cycle.