Hoverfish

The Hoverfish are -like beings, but floating not in water but in the air. They are intelligent enough to obey commands, but do not seem to like humans. A group of ten Hoverfish are held by Mom and her sons.

Production
The Hoverfish have only been seen in storyboard to the upcoming episode "Overclockwise". It is not entirely clear in the storyboard if they are biological or mechanical (robotic) creatures.

Additional information
They could be inspired by sentinels of Matrix series.