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Bumphead parrot fish around the Gili Islands, Indonesia

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Bumpheads parrotfish are one the main attraction during a dive around the Gili Islands. When it is full moon there is a good chance to see them in big groups.

The Bumphead parrotfish is the largest of all parrotfishes, growing to 1.3 meters in length and 100 46 kg in weight. Adults are a dull green, with the front of the head pale yellowish to pink; juveniles are
greenish to brown with five vertical rows of small whitish spots. This species does not display sex-associated patterns of color change. Adults develop a bulbous forehead and their teeth plates are exposed (only partly covered by fleshy lips). The species is slow growing and long-lived (up to 40 years), with delayed reproduction and low replenishment rates

Bumphead parrotfish appear to recruit at low levels throughout the year but are not very selective about
which habitats they settle into. They live in coral reef habitats from 1-30 meter depth in the central
and western Pacific and Indo-Pacific. They occur in barrier and fringing reefs during the day, but
rest in caves or shallow sandy lagoon flats at night. Juveniles are found in seagrass beds inside lagoons while adults are more commonly found in outer lagoons and seaward reefs. This species is gregarious and usually occurs in small aggregations, but group size can be quite large (>75) on seaward and clear, outer lagoon reefs. They sleep in large groups, thus rendering them highly vulnerable to exploitation by spearfishers and netters at night.

Bumphead parrotfish is primarily a corallivore, but also eats benthic algae. They use their large head to ram corals and break them into pieces that are more easily ingested (each fish ingests over 5 tons of structural reef carbonates per year), contributing significantly to the bioerosion of reefs.

Aggregations of this species are important coral sand producers on reefs and may be important in maintaining ecosystem resilience.

They spawn pelagically during a lunar cycle near the outer reef slope or near promontories, gutters, or
channel mouths, and utilize spawning aggregations sites. Courtship and spawning has been reported to occur in early morning, although it may occur at other times.

Bumpheads around Gili Islands Indonesia

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Bumpheads parrotfish are one the main attraction during a dive around the Gili Islands. When it is full moon there is a good chance to see them in big groups.

The Bumphead parrotfish is the largest of all parrotfishes, growing to 1.3 meters in length and 100 46 kg in weight. Adults are a dull green, with the front of the head pale yellowish to pink; juveniles are
greenish to brown with five vertical rows of small whitish spots. This species does not display sex-associated patterns of color change. Adults develop a bulbous forehead and their teeth plates are exposed (only partly covered by fleshy lips). The species is slow growing and long-lived (up to 40 years), with delayed reproduction and low replenishment rates

Bumphead parrotfish appear to recruit at low levels throughout the year but are not very selective about
which habitats they settle into. They live in coral reef habitats from 1-30 meter depth in the central
and western Pacific and Indo-Pacific. They occur in barrier and fringing reefs during the day, but
rest in caves or shallow sandy lagoon flats at night. Juveniles are found in seagrass beds inside lagoons while adults are more commonly found in outer lagoons and seaward reefs. This species is gregarious and usually occurs in small aggregations, but group size can be quite large (>75) on seaward and clear, outer lagoon reefs. They sleep in large groups, thus rendering them highly vulnerable to exploitation by spearfishers and netters at night.

Bumphead parrotfish is primarily a corallivore, but also eats benthic algae. They use their large head to ram corals and break them into pieces that are more easily ingested (each fish ingests over 5 tons of structural reef carbonates per year), contributing significantly to the bioerosion of reefs.

Aggregations of this species are important coral sand producers on reefs and may be important in maintaining ecosystem resilience.

They spawn pelagically during a lunar cycle near the outer reef slope or near promontories, gutters, or
channel mouths, and utilize spawning aggregations sites. Courtship and spawning has been reported to occur in early morning, although it may occur at other times.

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One of the problems on the Gili Islands is beach erosion. Beach erosion is defined by the actual removal of sand from a beach to deeper water offshore or alongshore into inlets, tidal shoals and bays. Such erosion can result from any number of factors, including the simple inundation of the land by rising sea levels resulting from the melting of the polar ice caps.

In the last few year there was a lot of beach erosion around the Gili Islands.
Specially the North Coast of the Gili Islands and more actual the East Coasts of the Gili Islands lost a lot of beach in the last couple of years. Meters of beach dissapeard at the last storm in March 2012.Of particular concern is the effect climate change, which not only causes sea levels to rise but also increases the severity and possibly the frequency of harsh storms, has on beach erosion. While sea level rise sets the conditions for landward displacement of the shore, coastal storms supply the energy to do the ‘geologic work’ by moving the sand off and along the beach. Therefore, beaches are greatly influenced by the frequency and magnitude of storms along a particular shoreline.Besides collectively lowering our greenhouse gas emissions substantially, there is little that individuals—let alone coastal landowners—can do to stop beach erosion. Building a bulkhead or seawall along one or a few coastal properties may protect homes from damaging storm waves for a few years, but could end up doing more harm than good. Bulkheads and seawalls may accelerate beach erosion by reflecting wave energy off the facing wall, impacting adjacent property owners as well, adding that such structures along retreating shorelines eventually cause diminished beach width and even loss.

Oceans 5 dive resort is trying to save some beach by replanting trees on the beach. The sand will not move that quick and hopefully the beach erosion doesnt goes that fast as in the past.