Yes. In Jain practice, fresh Nariyal Pani (coconut water) and the coconut pulp are generally acceptable for puja or prasad on Anant Chaturdashi. Coconut is a tree fruit and not a root, so it is typically considered permissible. If you observe a strict vrata or fast, you can offer the coconut water and pulp to the Tirthankar (e.g., Mahavir) as a simple aarti and prasad.

A few practical notes:

• Ensure the coconut is collected in a way that minimizes harm to living beings and that you use a fresh, clean coconut.
• If you follow Digambar or Shwetambar customs, both traditions commonly use fruits and coconut in offerings, but you may encounter local family or temple customs that differ slightly. In general, coconut is acceptable in both.
• If you are observing a specific vow (vrata) during Anant Chaturdashi, follow that vow’s guidelines regarding foods and offerings.

If you’d like, I can share a concise artha (meaning) of a related Anant Chaturdashi stanza or describe a simple Jain puja for Anant Chaturdashi.