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Author: Expedition Scientist

Area measurement mode using CPCe software to calculate organism surface area

Studying Reefs, Staying Dry

We collect enormous amounts of data and observations during our missions, a lot of which is collected in situ, or in its original place, by researchers while they’re underwater. But one of the things we do while underwater is take

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Best Dive at the Great Barrier Reef

Best Dive

On every mission during the Global Reef Expedition survey divers can usually point to one dive as being the highlight of the trip. It might be a dive with lots of great looking healthy coral or maybe a dive where

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The school of giant trevally that chased off the barracudas.

Be Careful, They Don’t Travel Alone

If you ask someone “Why do fish school?” you will likely get “to avoid predators” for an answer. After all, the more eyes you have watching the harder it is for anything to sneak up on you. Furthermore, if a

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School of Humpback Snapper

Stories of a Fish Surveyor

Marine parks have been introduced worldwide to preserve biodiversity and protect important underwater habitats. Protected zones serve as baselines for undisturbed, natural ecosystems that can be used to measure the effects of human activities in other areas, and thereby help

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Blacktip Reef Shark

Sharks!

Sharks are a natural component of coral reef ecosystems, where they occupy the role of top-order predators. Reef sharks are important to the overall health of the coral reef assemblage, and their presence is generally an indication of a coral

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Olive sea snake hunts in crevices on the Great Barrier Reef.

Surprise Encounter with an Olive Sea Snake

Let me tell you about yesterday’s wonderful (seriously) sea snake encounter while it’s still fresh in my mind. First of all, up here in the northern Great Barrier Reef we’re getting close to saltwater crocodile territory.  They can grow to

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Threadfin Pearl Perch

Threadfin Pearl Perch: A Gem of a Fish

As we travel across the Pacific Ocean during the course of the Global Reef Expedition we encounter many species of fishes on our survey dives. Many are widespread species that we see in most of the countries we visit though

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Measuring Reef Rugosity of the Great Barrier Reef

Rugged Reefs

Sitting at 25 m (82 ft) wrapped in a completely tangled metallic chain that would make Mr. T envious, I often ask, “What have I gotten myself into?” Indeed, one may wonder why anyone would want to take a long,

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Granular Sea Star, Choriaster granulatus

Stars of the Reef

The most familiar members of the phylum Echinodermata are the sea stars (aka starfish). Also contained within this phylum are diverse members such as sea cucumbers, crinoids, brittle stars, and sea urchins. Echinoderms possess an interesting body shape known as

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Fish Surveys of the Great Barrier Reef

Finding Fabulous Fish!

As fish surveyors, our job is to identify, count, and size all the fish we see within 30m x 4 m transect lines. To do this, we drop one end of our transect tapes at 10m depth, and swim slowly

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