General
The cold northern and southern oceans are home to many marvelous creatures, but almost all of them depend, in one way or another, on these tiny crustaceans. Krill are the base of the arkenian food chain, at their peak season forming masses that weigh millions of tons. Whales, seals, penguins, leviathans, fishes, and many other creatures feed largely or exclusively on krill. The small invertebrates are interesting as more than just food, however. Accustomed to living in enormous clusters, krill dislike being alone. To ensure this, their eggs are always laid in pairs, and they remain with their hatchmate for life. They are never far from one another, and can be identified by their beating hearts, which are visible through their semitransparent exoskeleton and beat in sync with one another.
Egg
These jelly-like eggs are fused together. They only ever seem to move together.
Hatchling
Young krill are unable to swim against the rough ocean currents and so spend most of their early lives drifting in the open ocean. They're filter-feeders, so most of their food (tiny algae and occasionally even smaller animals) comes along with them. They remain close to their hatchmate, using their tiny legs to swim closer together if they start to drift apart. It doesn't take long for them to reach their full size -- usually just a few weeks.
Adult
Adult krill can reach lengths of up to fifteen centimeters, though most are less than a third that size. They remain fairly small creatures, especially compared to the much larger animals that eat them. As adults, krill are capable of swimming against weak currents. They use this to their advantage to avoid predators during the day, preferring to spend time at depth while diurnal predators are active, and wandering closer to the surface at night. However, strong currents can produce upwells that sweep swarms of krill to the surface of the water where they can incite a feeding frenzy among their usual predators. Some krill can escape these events by diving to lower depths, though they can also shed their exoskeletons to use as a decoy for a hungry predator. Whether they escape or not, hatchmate pairs stick close together to ensure they endure the same fate.
Notes
Obtained from: Event, Valentines, Retired
Breeding: Yes
Renaming cost: 200 gold
Release date: February 14th 2019
Element: Neutral 
Breeds with the following:
Krill + Krill = Krill (Easy)
Sprite art: Mysfytt | Description: PKGriffin