Watching marine animals without disturbing them

The simplest rule for watching marine animals is to let the animal decide how close you get. Stay far enough away that it carries on with what it was doing, move slowly and predictably, and leave as soon as you notice signs of stress. Most disturbance comes from people who approach too quickly, swim directly at an animal, chase it for a better view or try to touch it.

Many animals will tolerate people when they feel safe, and that is exactly why the rules matter. An animal that keeps feeding, cleaning or resting while you watch is showing that you are not a threat. An animal that changes course, hides or leaves is telling you that you are too close. Your aim is to observe without changing what the animal does.

Keep your distance and let the animal come to you

Many marine parks and local authorities set minimum approach distances for turtles, marine mammals and some other animals. Where a distance is posted or required, treat it as a legal minimum. Where none is set, keep a distance that lets the animal ignore you. Avoid positioning yourself between an animal and open water, or between a mother and her young, since this can block escape routes. Approach from the side at a slight angle rather than head-on, which can feel threatening to many animals.

Let curious animals come to you rather than moving toward them. Waiting quietly, with your body relaxed and your hands at your sides, often leads to a closer encounter than any attempt to get nearer. Do not touch, ride or grab turtles, rays, sharks or any other animal, even if it seems calm. Touch can damage the protective mucus layer on fish, can harm the animal and can expose you to injury, since many marine animals have spines, teeth or venom.

Move slowly and predictably

Quick, erratic movements startle animals, while smooth, steady swimming is easy for them to read. Use long, gentle fin kicks, keep your arms close to your body and avoid sudden turns near an animal. Kicking hard can stir up sand and silt, which can hide the animal and make it leave. Keep your buoyancy under control so you do not sink onto the seabed or bump into the reef.

Do not chase animals to get a photograph or a closer view. Chasing forces an animal to spend energy fleeing, and it can drive animals away from the feeding, resting or cleaning areas they rely on. Waiting in one place is often more productive. Animals that feel safe may return on their own, and a patient observer usually gets more time with them than one who keeps moving after them.

Recognize the signs of stress

Animals usually signal discomfort before they flee. Turtles that dart away or dive quickly, fish that leave a cleaning station or a feeding spot, rays that swim off and keep moving, and octopuses that change color or retreat into a hole may all be reacting to you. Marine mammals can change direction, dive suddenly or alter their swimming and breathing pattern when they are uneasy.

When you see these signs, stop, hold still and, if the animal is moving away, let it go. Back away slowly rather than turning quickly. If the animal continues to react, leave the area altogether. Tell your guide or group what you saw, so the plan can change for the rest of the outing. If you see an animal injured or entangled, report it to the local park or authority as soon as you can.

Habits for turtles, marine mammals and resting animals

Sea turtles need to reach the surface to breathe, so never block a turtle's route upward or push it down toward the reef. If one is heading for the surface, stay out of its line of travel, hold your position and let it pass. Turtles resting on the seabed or tucked under a ledge should be left alone entirely.

Marine mammals call for a different approach. If the site and your guide allow entry, slip into the water quietly and away from the animals rather than jumping in beside them, since splashing and sudden noise can startle them. Let them decide whether to come closer, and do not swim across their path.

Many fish, rays and turtles rest on the seabed or in open gaps. Do not dive down on top of a resting animal. Plan your descent so you land on clear sand away from it, and go down slowly enough to see where it is before you move closer. If it wakes and moves, give it room to go.

Follow local rules and group habits

Limits in the site briefing, such as closed areas and group size, take priority over the general guidance here. On the way back to the boat, pick up only loose debris that is safe to handle and has nothing living on it, and report nets, heavy line or entangled animals rather than handling them.

The best wildlife encounters are often the ones where the animal decides to stay. Patience, a steady approach and a readiness to leave will usually give you more time with an animal than any attempt to get closer. If you finish the dive with the animal still feeding, cleaning or resting, you have done the job well.