What is ReefBay?

ReefBay is a reef aquarium app for iPhone and Android, created by app developer Billy Voitik and launched in April 2024. It helps saltwater aquarium keepers identify fish, coral and pests from a photo, track water parameters, schedule maintenance, keep a profile of their tank and livestock, ask an AI that knows their tank, buy from local reefers and share their tank with a community. It is available in 8 languages: English, German, Japanese, French, Italian, Dutch, Spanish and Portuguese. The app is free, with an optional DeepDive membership at $4.99 a month or $39.99 a year.

Who makes ReefBay

Billy Voitik

Creator of ReefBay · @billy on ReefBay

Billy Voitik created ReefBay and launched it in April 2024. He has worked as a professional app developer since 2017, on game development, app development and ad network development teams, and builds ReefBay to give the saltwater community better tools.

Free vs DeepDive

DeepDive is $4.99 a month or $39.99 a year. The monthly plan starts with a 3-day free trial.

What ReefBay does

• Reef ID : Identify fish, coral, inverts, pests and algae from a photo.
• Zoa ID : Free zoanthid morph identifier. Name your zoas from a photo.
• DeepDive AI : An AI reef assistant that already knows your tank.
• Saltwater Fish ID : Name any saltwater fish from a photo and get its care needs.
• Reef Pest ID : Spot aiptasia, flatworms, bubble algae and other pests early.
• Parameter Tracker : Log alkalinity, calcium, nitrate and more, and watch the trends.
• Maintenance Reminders : Recurring reminders for water changes, testing and cleaning.
• Tank Profile : One shareable page for your tank, livestock, photos and parameters.
• Livestock Tracking : Know what went into your tank, when, and how it is growing.
• Reef Community : Share your tank, ask questions and follow other reefers.
• Local Marketplace : Buy frags, fish and gear from reefers near you.
• Support Local Sellers : Help independent reef stores and small coral farms reach reefers.

What ReefBay doesn't do

• Reef ID, fish ID and pest ID are for saltwater organisms only. They do not identify freshwater fish, plants or invertebrates.
• ReefBay is built mainly for saltwater reef tanks. You can still create a profile for a freshwater tank and add freshwater fish, plants and invertebrates.
• It does not connect to aquarium controllers or automatic testers such as Neptune Apex or Trident. Test results are logged by hand or imported from a photo.
• AI results (Reef ID, Zoa ID, DeepDive) are suggestions, not guarantees. Confirm before treating, removing or buying livestock.
• Most tools live in the app. The website has the community feed, Zoa ID, parameter logging, the species library and the shop; maintenance reminders, Reef ID and DeepDive are in the app.
• Local listings depend on reefers and stores near you, so some areas have few listings.

Frequently asked questions

Questions? Email [email protected] or message @billy in the app. Last updated September 30, 2026.