Yes, in some Jain contexts, unnecessary bathing can be reduced or avoided in the spirit of ahimsa, because water may contain very small living beings, and Jain conduct avoids harming them as far as possible.

However, this should be understood carefully:

• Bathing for cleanliness or health is not prohibited in Jain Dharma.
• The principle is minimum harm, maximum awareness.
• If bathing is needed, one should do it gently and with restraint, avoiding waste of water and unnecessary harm.
• For monks and nuns, vows and practices may be stricter, so bathing norms can differ by tradition and circumstance.
• For householders, Jain ethics generally allow necessary bathing while maintaining ahimsa and aparigraha.

So the Jain approach is not “never bathe,” but bathe only as needed, with careful awareness and less violence.

If you want, I can also explain this according to Digambar and Shwetambar practice differences.