gun coral shrimp
seen? This fat little green shrimp is sometimes living
among branching corals such as Acropora
corals (Acropora sp.) and Montipora
corals (Montipora sp.). It is usually well hidden and hard
to spot and photograph.
Features: About 1cm long. Body
is short and fat, with a bent back. Large eyes wide apart. Usually
dark green with fine white and dark stripes.
Double snap: It has a pair of
huge flattened pincers that can be larger than its body. Like the
snapping shrimps (Family Alpheidae), the
pincer has an enlarged tooth and a special catch. When the catch is
released, the tooth makes a loud snapping sound. Unlike the snapping
shrimp which only has one such 'snapping' pincer, the Machine gun
shrimp has two such pincers, hence its common name. But the 'snaps'
of the Machine gun shrimp is not as powerful as those of the snapping
The shrimps probably use their snapping pincers to protect their home
from animals that might damage the coral. They are not believed to
eat their host and simply use the coral as shelter.
Usually, a pair is seen in a single coral colony.
Cyrene Reef, Aug 10
- Lim, S.,
P. Ng, L. Tan, & W. Y. Chin, 1994. Rhythm of the Sea: The Life
and Times of Labrador Beach. Division of Biology, School of
Science, Nanyang Technological University & Department of Zoology,
the National University of Singapore. 160 pp.
G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore
Red Data Book: Threatened plants and animals of Singapore.
Nature Society (Singapore). 285 pp.
- Wee Y.C.
and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore.
National Council on the Environment. 163pp.
- Jones Diana
S. and Gary J. Morgan, 2002. A Field Guide to Crustaceans of
Australian Waters. Reed New Holland. 224 pp.
- Humann, Paul
and Ned Deloach. 2010. Reef
Creature Identification: Tropical Pacific New World Publications.
- Kuiter, Rudie
H and Helmut Debelius. 2009. World
Atlas of Marine Fauna
. IKAN-Unterwasserachiv. 723pp.
Helmut, 2001. Crustacea
Guide of the World: Atlantic Ocean, Indian Ocean, Pacific Ocean
IKAN-Unterwasserachiv, Frankfurt. 321 pp.