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Coral journal
📸 Coral Journal
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Why reef sound matters
The Science Behind ReefSound
Healthy reefs are not silent. They are full of acoustic cues from fish, snapping shrimp, water movement, grazing, and other reef life. In reef-restoration research, playback of healthy reef soundscapes has been shown to attract fish to degraded reefs and has been studied as a cue that may support coral larval settlement.
Many reef fish can detect sound and vibration. Healthy reef noise may help signal that a habitat is active, complex, and biologically rich.
Early research suggests that reef soundscapes may influence coral larvae and settlement behavior. ReefSound brings that idea into the aquarium as a careful, testable enrichment tool.
Most reef studies use underwater speakers in open reef environments. ReefSound currently uses phone or Bluetooth speaker playback, so it should be viewed as experimental acoustic enrichment, not a proven treatment.
ReefSound is built around the aquarium ecosystem, but many people may also find the soundscapes calming, immersive, and enjoyable — a small piece of the ocean at home.
Simple idea: ReefSound is not just playing relaxing ocean noise for people. It is designed to create a more natural acoustic environment for fish, corals, and other reef organisms.
Current Reef Environment
RegionCaribbean Reef
Species ProfileMixed Reef
Speaker PlacementAbove Aquarium
Moon PhaseCalculating...
SoundscapeAcoustic Sunrise
Next TransitionDay Reef soon
These bars describe the soundscape ReefSound is generating. They are not live measurements from your aquarium.
Build Your Reef Soundscape
Speaker placement: Above Aquarium is the easiest starting point. Keep volume low and watch livestock behavior.
Region note: different reef regions may sound similar to human listeners. ReefSound emphasizes ecological acoustic patterns that may matter to aquarium inhabitants, even when differences are subtle to our ears.
🔊 Bluetooth Speaker Setup
ReefSound plays through whichever speaker your phone, tablet, or computer is already using.
- Pair your Bluetooth speaker in your device settings.
- Set that speaker as your audio output.
- Return to ReefSound and press Start ReefSound.
Tip: most browsers do not let websites directly pair Bluetooth speakers. Pair the speaker through your device first.
🌙 Lunar Cycle Engine
ReefSound automatically calculates the moon phase and shifts nocturnal soundscapes.
◐
Lunar cues are biologically relevant on reefs, especially around reproductive timing and nighttime behavior.
🍤 Feeding Mode
Temporarily increases active reef cues before and during feeding, then fades back to the normal schedule.
Feeding mode is off.
🌅 Acoustic Sunrise
Instead of simply turning sound on, ReefSound gradually wakes the tank with increasing reef activity before daytime lights.
- Faint shrimp clicks
- Early fish calls
- Full daytime reef chorus
Choose how ReefSound plays
🎧 Reef Preset or Custom Mix?
Use a ready-made reef soundscape when you want ReefSound to run automatically, or create your own mix when you want to adjust shrimp, fish, ocean ambience, acoustic complexity, and special sounds.
Use Reef Preset
Best for everyday use. ReefSound follows your reef region, species profile, lighting schedule, lunar cycle, feeding mode, and speaker placement.
AutomaticDay/NightLunar Cycle
Create Custom Mix
Best for experimenting. Manually set shrimp sounds, fish sounds, ocean ambience, acoustic complexity, and optional whale/dolphin accents.
CustomSaveShare
Current mode: Reef Preset. Use the main Reef Region and Species Profile controls for automatic soundscapes.
Tip: Reef Preset mode uses the main controls above. Custom Mix mode uses the sliders below.
Create your own reef soundscape
🎛️ Create Custom Mix
Build your own mix of shrimp clicks, fish calls, ocean ambience, acoustic complexity, and optional whale/dolphin sounds. Save it for your tank or share it with the ReefSound community.
Audio update: The preview now uses more distinct generated layers for shrimp crackle, fish grunts, ocean ambience, dolphin clicks/whistles, and whale-like tones. These are still prototype sounds, not licensed field recordings yet.
No custom mix saved yet.
My Mixes
Community Mixes
FAQ
Why don't all reef soundscapes sound dramatically different?
Healthy reefs share many acoustic features, including snapping shrimp, fish calls, grazing sounds, and background reef noise. Fish and many marine organisms detect sound and vibration differently than humans, so differences that seem minor to us may still be biologically meaningful.
Why can't I hear some of the differences the app describes?
Humans do not hear underwater sound the same way reef organisms do. Some acoustic differences that may be important to fish and corals can be difficult or impossible for humans to perceive directly.
Is ReefSound meant for me or for my aquarium?
The primary goal of ReefSound is to provide a naturalistic acoustic environment for aquarium inhabitants. While many users enjoy listening to the soundscapes, the app is designed first and foremost around the biology of reef ecosystems and the sensory experiences of the animals living in them.
Are the soundscapes meant to be enjoyable for people too?
Yes. ReefSound is designed first for the aquarium ecosystem, but reef keepers may enjoy listening as well. Water movement, fish-call-like sounds, shrimp clicks, and reef ambience can create a relaxing and immersive connection to the natural environments these animals come from.
Why would I use reef sound in a home aquarium?
Healthy reefs have rich soundscapes. ReefSound is designed to give aquarium inhabitants a more natural acoustic environment by recreating some of those reef cues. The goal is enrichment: adding a sensory feature that is common in nature but usually missing from home aquariums.
What is the science behind this?
Research in reef restoration has shown that healthy reef playback can help attract fish to degraded reefs, and related work suggests reef sounds may play a role in coral larval behavior and settlement. ReefSound applies those ideas cautiously to aquariums, where the conditions are different and still need testing.
What do Fish Activity, Shrimp Activity, and Acoustic Complexity mean?
They are descriptions of the soundscape being generated. Fish Activity reflects how many fish-call-like cues are included. Shrimp Activity reflects snapping-shrimp click patterns, which are common on healthy reefs. Acoustic Complexity reflects how layered and variable the overall reef environment is. These are not sensor readings from your tank.
Why does the sound change with the moon?
Many reef organisms show behaviors tied to lunar cycles. ReefSound uses moon phase as a natural timing cue for nighttime soundscape changes and educational coral-spawning context.
Is this proven to make corals grow faster in home tanks?
No. ReefSound is an experimental aquarium-acoustics tool based on reef restoration research and ecological soundscape principles. The Coral Journal is designed to help users observe patterns responsibly over time.
How do I use Bluetooth?
Pair your speaker through your phone or computer settings, then start ReefSound. The app sends audio to whatever output your device is currently using.
Moon, tide, and reef timing
🌕 Natural Reef Rhythms
Natural reefs change across the lunar month, day/night cycle, tides, and reproductive seasons. ReefSound uses these rhythms to create more ecologically realistic soundscape changes without claiming that they are proven to cause coral growth in home aquariums.
Tonight's Reef Rhythm
Moon PhaseCalculating...
Reef RhythmCalculating...
Tide-Inspired ProfileCalculating...
Calculating tonight's natural reef rhythm...
Use this to load a natural reef rhythm into ReefSound's sound settings.
🪸 Coral Spawning Window
Calculating lunar timing...
This is educational only. Actual coral spawning depends on species, season, geography, temperature, light, and many other conditions.
Educational
Lunar Timing
Night Reef
🌑 New Moon Night
Darker-night profile with more nocturnal reef crackle and lower ambience.
🌕 Full Moon Reef
Higher nighttime reef activity and acoustic complexity inspired by full-moon reef behavior.
🪸 Spawning Window
Educational spawning-night soundscape with elevated nocturnal reef activity.