The hummingbird bobtail squid is widespread throughout the tropical waters of the central Indo-Pacific area from Indonesia to the Philippines.

[5] It is also possible that a larger distribution could reach the Andaman Islands, Sri Lanka and the western coast of India (some specimens were collected by scientists in 200-/2007).

[6] Euprymna berryi occupies the benthic layer, as it prefers sandy or fine sediments seafloors in which it can easily bury itself in case of danger or to rest in during the day.

[7] The hummingbird bobtail squid demonstrates nocturnal activity, and during daytime it usually stays buried in its preferred substrate.

To hunt its prey at night, it uses a bioluminescent organ located in the gill cavity which just emits enough light not to reveal its silhouette to potential predators.