Summary

A cool fish cave that you can put in your fish tank. Sized for beta fish but can be scaled up or down.

Dimensions: 100mm (length) x 100mm (width) x 68mm (height)
Cave entrance clearance: 30mm

No supports required. Print with gyroid infill (5%-20%) and create a hole to let water seep into it. Brim may be needed to prevent the sides of the rock from falling over early on.

Also, try with fuzzy skin to make it a more bumpy rock!