Brinewing

The Brinewing is a small, predatory fauna species that will appear in Subnautica: Below Zero.

Appearance
The Brinewing possesses a long snout. The top jaw has a blue tip with a pair of small blue spines protruding upwards from it. The two fins are composed of a thin yellow appendage with a translucent blue membrane attached. In their resting state the fins appear small and triangular, but can extend into an almost full semicircle shape.

The main body is small, ending with a tail fin that appears to have been heavily reduced into a small spike. The front portion of the body is yellow and the back portion blue with yellow rings. The brine bladder is white in color and has a pair of short spikes on each side of the body. The brine bladder expands to accommodate the brine the creature uses to attack its prey, becoming distended and translucent. The Brinewing has two dark green eyes that become lighter towards the black pupil, and a small hole above each of these eyes that may be nostrils.

Behavior
The Brinewing has a highly unique attack: super cooled saline solution is expelled from its mouth at high speed. This creates a snap-freezing "brinicle" which freezes prey or defends against attackers. The Brinewing uses its fin-wings to keep the saline at super critical temperatures by deploying them to speed up heat loss from its body, keeping the brine cold.

The Brinewing's translucent bladder holds the saline that the Brinewing uses for its attack. It can contract its bladder at will to expel the saline through the mouth. Once expended the bladder recedes until filled with brine once more.

Design
The Brinewing bears many features reminiscent of members of the real life group of fish Sygnathiformes; The large transparent fins resemble the oversized fins of the flying gurnard, whilst the long snout and general head shape resembles the elongated snouts of Sygnathiforme fish within the subfamily Hippocampinae i.e. seahorses. The concept of the Brinewing's projectile attack hunting method may take inspiration from the real life archerfish, which are known for acquiring their prey by knocking off branches by firing a jet of water from their mouth.