aquaticcritter
nounUK /əˈkwætɪk ˈkrɪtə/
US /əˈkwɑːtɪk ˈkrɪtər/
A small animal that lives in water.
We saw a tiny aquaticcritter swimming in the pond.
OTHER MEANINGS
2. A fish or other water animal kept in a home tank.
Her aquarium is full of colorful aquaticcritters.
3. A tiny bug or creature that skims on top of a pond.
An aquaticcritter skated across the still water.
4. A playful word for any swimming animal in a story.
The book's hero was a brave little aquaticcritter.