Abylopsis tetragona is a colonial organism, which is primarily gelatinous and measures about 1 cm.

Abylopsis tetragona's common name is siphonophore and can be defined as eurythermal and euryhaline, meaning that they can endure a wide range of temperatures and salinities.

But looking at it more closely, this mega-organism is made up of individual organisms called zooids (attached polyps medusae).

Siphonophores can form bioluminescent structures, enabling them to lure their prey and provide some defense mechanism against their predators.

Abylopsis tetragona can be found at depths between 0 and 200m deep from the tropical to temperate oceans.

This species is abundant in the Atlantic, Pacific, Indian oceans, and the Mediterranean Sea.

In the Atlantic Ocean and the Mediterranean sea, the Abylopsis tetragona is mainly found between the depths of 50 and 200m.

However, more generally, calycophorae siphonophorae, the family of the Abylopsis tetragona,  start their life cycle as an egg that forms into protozoid.

The main breeding period of this species is during the spring (April to June), despite their constant presence in the waters all year round.

The diel migrations and vertical distributions of zooplankton and micronekton in the Northwestcrn Mediterranean Sea.

Appearance of Chelophyes appendiculata and Abylopsis tetragona (Cnidaria, Siphonophora) in the Bay of Villefranche, northwestern.

Thèse de Doctorat ès Sciences, Université Aix-Marseille II, 380 p. Guerrero, E., Kienberger, K., Villaescusa, A. et al. First record of beaching events for a calycophoran siphonophore: Abylopsis tetragona (Otto, 1823) at the Strait of Gibraltar.