Responsible Diving Awareness

We don't notice — and we don't know we don't notice

The study's most unsettling finding is not numerical — it is psychological. More than 80% of damaging contacts are unintentional and go unnoticed by the diver. The diver does not know they touched the reef. They do not see the fin tip snapping a coral branch, the torso stirring up sediment, the hand brushing a polyp colony.

This is a problem that goes far beyond "careless divers." The researchers found that divers underestimate their own impact by approximately a factor of five. And 69% of divers rate themselves as "more careful than average." Lin and colleagues explicitly frame this as a Dunning-Kruger effect: as knowledge and awareness increase, self-assessment converges with reality — but a superficial "environmental consciousness" can sometimes produce the opposite, generating overconfidence.

Why gloves are a particular problem

The study found that camera use, muck sticks (stabilisation rods), and gloves were all associated with more frequent reef contact. The mechanism is not direct — it is behavioural: these items change how a diver moves, what they pay attention to, and how willing they are to get close.

For gloves specifically, the mechanism is this: gloves lower the threshold for contact by providing the reassurance of "I won't cut my hand." A diver who would hesitate to touch something bare-handed abandons that hesitation when gloved. But from the coral's perspective, there is no difference — gloves do not protect polyp tissue. What they do is blunt the diver's own feedback mechanism (the sense of touch) and reduce awareness.

Excitement and social contagion

The research documented two further behavioural triggers. First: when wildlife is sighted — a turtle, a shark, a large fish — the rate of intentional contact increases by 220%. Excitement draws attention away from the reef, and the diver collides with it while approaching the animal, or reaches out to touch the animal directly.

Second, and perhaps less expected: other divers' contact is "socially contagious." When one diver touches the reef, those nearby tend to follow. This illustrates the influence of group dynamics on individual behaviour — and explains why a guide's ability to intervene is critical, and why it diminishes in larger groups.

An earlier study (Webb et al., 2016, Green Fins operators in the Philippines) found that 88% of 100 observed divers made at least one reef contact per dive. The same study showed that intentional contact was significantly lower at Green Fins-certified, higher-performing centres — evidence that guide quality and institutional culture make a measurable difference.

The Rubelis perspective: why rule memorisation is not enough

These findings provide scientific support for the problem Rubelis Beyond is designed to address. The vast majority of divers already have environmental awareness — they know the "don't touch the reef" rule. But their behaviour operates independently of their conscious intentions: automatically, unnoticed, in response to situational triggers.

Rubelis's emphasis on "situational awareness" targets exactly this: not knowing the rule, but noticing the moment when the rule applies. Feeling how excitement affects your fins when you spot a turtle. Knowing how gloves shift your contact threshold. Seeing how a nearby diver's touch pulls at your own behaviour.

In practice: if you dive with gloves or equipment

Wearing gloves or using a camera is not wrong — but knowing how these items change your behaviour is essential. A few concrete suggestions:

• When you wear gloves, know that your contact threshold has dropped. Give yourself extra clearance when approaching the reef.
• When using a camera or rod, notice the moments when your attention shifts to the screen or the stick. Your fin control decreases in those moments.
• When you spot wildlife, observe how excitement affects your fins. Take a breath before approaching, check your position.
• When a diver near you touches the reef, watch your own behaviour. Develop a conscious resistance to social contagion.

Good intervention — whether self-directed or from a guide — is immediate, non-shaming, and reinforced by post-dive feedback. Not "you touched the reef," but "did you notice your fin tip catching that coral branch just now?" Awareness, not accusation.

The viral mechanism: zooxanthellae and the lytic cycle

The impact of oxybenzone on coral is not limited to direct toxicity. In 2008, Roberto Danovaro and colleagues demonstrated that chemical UV filters trigger the viral lytic cycle in zooxanthellae — the symbiotic algae that live inside coral tissue. In other words, oxybenzone activates dormant viruses within the algae; those viruses then destroy the algal cells, and the coral, deprived of its photosynthetic partner, bleaches.

This mechanism matters: it shows that bleaching can be triggered not only by rising water temperatures but also by chemical stress. Combined with the thermal pressure of climate change, the cumulative effect of chemical UV filters becomes increasingly significant.

Legal bans and a note on scientific honesty

Hawaii became the first US state to ban the sale of sunscreens containing oxybenzone and octinoxate in 2018, with the law taking effect in 2021. Palau followed in 2020, and Bonaire in 2021. All three jurisdictions cited the scientific evidence directly in their legislative rationale.

In the interest of scientific honesty, it is worth noting that some of the early toxicity studies used laboratory concentrations considerably higher than those measured on actual reefs. This remains a point of active debate in the scientific community. Some researchers argue that real-world exposure levels are lower than laboratory conditions suggest, and that risk assessments should be more nuanced.

This debate is not a reason to dismiss the issue — it is a reason to read more carefully. Even where the evidence is not yet fully settled, the precautionary principle applies: if a less harmful alternative exists and provides equivalent protection, why accept the risk?

The Rubelis perspective: preparation is also a field of awareness

This section makes the core Rubelis Beyond argument concrete: situational awareness operates not only underwater, but in the preparation before a dive. Picking up a tube of sunscreen without reading the ingredients — that is an ordinary, everyday consumer decision. But the moment that decision connects directly to an ecosystem outcome, it is no longer ordinary.

As we saw in Section 1, the majority of damaging reef contacts were unintentional and unnoticed. Sunscreen choice operates in a similar blind spot: most divers do not know what is in the product they use, and have never considered that those ingredients reach the reef. Awareness begins by making that blind spot visible.

In practice: our non-toxic sunscreen policy

Rubelis Beyond recommends the following choices to all divers and guests:

• If you use sunscreen, look for non-nano zinc oxide or titanium dioxide on the ingredient list. Avoid products containing oxybenzone, octinoxate, homosalate, octisalate, or avobenzone.
• Where possible, choose a UV-protective garment or rash guard over sunscreen. This provides more effective protection and reduces the amount of chemical entering the water to near zero.
• If you do use sunscreen, apply it at least 20–30 minutes before entering the water to allow the skin to absorb it and reduce the amount that washes off immediately.

These choices may seem small. But small choices, repeated across every dive and every diver, accumulate into a meaningful difference. Situational awareness does not begin underwater — it begins the moment you pick up the tube.

Is volunteer data scientific data? Yes.

The reliability of citizen science data is sometimes questioned. That is a legitimate concern — but we now have a direct answer. Researchers from Scripps Institution of Oceanography and Stanford University (Brice Semmens, Dan Greenberg, and colleagues) published a study in Conservation Letters comparing 25 years of REEF volunteer diver data from Florida's Key Largo against NOAA's official federal fish population surveys. The result: a strong correlation. Volunteer data quality was independently validated against federal scientific standards.

This finding matters because it dismantles a common assumption: "I'm just a recreational diver — what use is my observation?" An observation made with a standard protocol can produce results consistent with federally accepted scientific data.

Which programmes exist, and how do you get started?

Three established programmes actively open to diver participation:

• REEF Volunteer Fish Survey Project: You complete fish species identification training, then fill in a standard survey form on each dive. Data goes directly into the REEF database. North America-based but with global coverage — active across the Caribbean, Pacific, Atlantic, and Mediterranean.
• Reef Check EcoDiver: A global training network. With an EcoDiver certification, you monitor coral health, fish populations, and invertebrate species using Reef Check's standardised protocol. Mediterranean coastal monitoring, and California kelp forest and marine protected area (MPA) monitoring are all run through this network.
• eOceans: An umbrella platform hosting species-specific projects including eShark and eManta. You log observations via a mobile app after each dive. Particularly valuable for charismatic but difficult-to-monitor species such as sharks and rays.

Only 5.8% of marine-focused citizen science projects directly feed data into marine protected area (MPA) designation and monitoring. That proportion may seem small — but these projects operate at wide geographic scales, and a small percentage can represent a substantial real-world impact. A study conducted in the Red Sea (STEproject) found that participation in a citizen science monitoring programme measurably increased both coral ecology knowledge and awareness of human behavioural impacts among participants — with the effect stronger in divers than in snorkellers.

The Rubelis perspective: the advantage of a network without physical boundaries

Rubelis Beyond is not a physical dive centre. That limits some things — but it genuinely frees one: where our graduates dive.

A physical centre can only extend the call to "be the world's eyes" to its own guests — to the reef where it is located, to the waters of that particular region. A Rubelis Beyond graduate dives in Indonesia, the Red Sea, the Caribbean, the Mediterranean. Each one can join a monitoring programme wherever they are; each observation becomes a data point from a different ecosystem. This is a genuine structural advantage of a digital, global training programme — stated plainly, without exaggeration.

Our commitment: participation in monitoring programmes

As Rubelis Beyond, we are committed to encouraging our graduates to join an active monitoring programme. This is not a requirement — it is an invitation. From the programmes introduced during the course (REEF, Reef Check EcoDiver, eOceans), each diver can choose the one that best fits their dive region and area of interest.

In the longer term, we aim to track the data points contributed by Rubelis Beyond graduates and make that contribution visible. When one diver's shark observation from Indonesia is joined by another's coral health record from the Mediterranean, it becomes possible to see concretely that this programme has built a genuinely global network.