Cheeca Rocks
On Wednesday May 18th we
snorkeled at Cheeca Rocks which is on the Atlantic side of the Florida Keys. It
is a SPA, or sanctuary protected area, where humans cannot touch or take anything
in the area. This regulation helps protect the organism in the coral reef from
harm. It is a mid-channel patch reef in Hawks channel and has a moderate
current, since it is not exposed to the long shore currents. Since it is on the oceanic side, there was better visibility than those on the Florida Bay side. It is considered a
true coral reef and is relatively new compared to other reefs in the area. The
site was about 20 ft at its deepest and visibility was great as we could see to
the bottom. Overall, hard coral was more abundant than soft coral, with Gorgonia ventalina as the predominant
soft coral species. There were shallower parts which had patchy areas of dead
coral caused by recreational diving and snorkeling. However, the site was rich
in fish due to the high amount of 3-D structure, which provided a habitat for
these organisms. The diversity of algae and grass was low, but the existing
algae were equipped with chemical defense mechanisms against herbivory.
In comparison to Tennessee Light and
Alligator reefs, Cheeca Rocks had a more moderate current, while the others had
a stronger current. Due to the strong current, Tennessee Light and Alligator
reefs had more coral overall because the water flow brought in more organic
material for coral intake. Soft coral was more abundant at these two sites
because they are much more flexible and resistant to breaking in the current. Cheeca
Rocks had a higher rugosity than the other two sites, which means the bottom
was less flat. It also was more rich in fish, but less diverse.
Species List:
Corals:
Sea rods
Porites porites
Diploria labyrinthiformis
Porites asteroides
Orbicella annularis
Colpophyllia natans
Siderastrea sidereal
Montastraea cavernosa
Gorgonia ventalina
Pseudopterogorgia
Seagrass/Benthic:
Caulerpa sp.
Thalassia sp.
Dictyota sp.
Sargassum
Loggerhead sponge
Asparagopsis sp.
Ctenophores
Spiny lobster
Christmas tree worm
Fish:
Stoplight parrotfish
Juvenile rainbow parrotfish
Rainbow parrotfish
Princess parrotfish
Midnight parrotfish
Great barracuda
Queen angelfish
French angelfish
Yellowtail damselfish
Four-eye butterflyfish
Spotfin butterfly
Black grouper
Nassau grouper
Hogfish
Burrfish
Sergeant major
Bluestriped grunt
French grunt
Spanish grunt
Yellowtail snapper
Schoolmaster
Porkfish
Blue wrasse
Scorpionfish
Green moray eel
Lizardfish
Blue head
Porcupinefish
Triggerfish
Nurse shark
Eagleray
Squid
Hawksbill sea turtle
Squirrelfish
Atlantic spade
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