Difference between revisions of "Diving the Cape Peninsula and False Bay/Dreadlocks Reef"
Latest revision as of 09:32, 19 February 2011
The site is colourful and fairly spectacular, and is specially notable for the relatively large colonies of the Dreadlocks hydroid Myriothela tentaculata. The depth is suitable for entry level divers.
S33°58'22.05" E18°21'42.59" (Top of pinnacle)
This site is in a Marine Protected Area (2004). A permit is required.
The site was named "Dreadlocks Reef" after the Dreadlocks hydroids found there in unusually large numbers.
Maximum depth is about 20m. and the top of the pinnacle is about 1.5m deep at low tide. (Average depth is likely to be about 12 to 15m)
Visibility will depend on weather conditions, and may be in excess of 15m on a good day after an offshore wind and upwelling.
Large corestone ridge with low surrounding reefs. The pinnacle is quite pointy, and the tip is only a couple of metres across. Ridge axis bearing 300°T (324° magnetic), ridge length 50m and width 20m at 12m deep. Length at bottom about 100m, width not known, but probably about 40m at widest. There is a smaller pinnacle a few metres to the south about 10m diameter at 12m depth.
The SAN charts indicate another high reef about 200m to the north-east of Dreadlocks pinnacle, but this has not yet been mapped.
Geology: Pre-Cambrian granite of the Peninsula pluton.
The site is exposed to westerly winds and swell.so should be dived in calm or offshore winds, when the swell is low, and is often good in South Easterly winds. The site is reasonably protected from easterly seas.
The site is usually at it's best in summer but there are also occasional opportunities at other times of the year.
This is an area which sometimes has upwellings of clear cold water, caused by offshore winds, resulting in good visibility and low temperatures, sometimes followed by algal blloms which will reduce the visibility again.
Usual access is by boat, but it could be dived from the shore by very fit divers in good conditions. The shortest distance to the shoreline is about 620m, but this may not be a suitable point for entry and exit.
The upper regions are covered in the usual large red-bait pods, and there is a light growth of kelp above about 12m depth. Lower areas are encrusted by sponges, colonial ascidians, sea fans, anemones, small red algae, crustose corallines, hydroids, bryozoans and echinoderms. The flatter deep reefs are heavily covered by sea cucumbers and sea urchins. Small shoals of Hottentot seabream can be expected. A variety of nudibranchs and other gastropods can be found.
Macro photography is likely to yield good results, and if the visibility is good, wide angle scenic shots should also turn out well.
The site is not very large: Start by going down to the bottom of the ridge, and swim round it looking for Dreadlocks colonies, then continue round as you ascend, and do your safety stop at the pinnacle if conditions allow.
No known site specific hazards
No special skills required for boat dive.
A dry suit or 7mm wet suit is recommended, as it will usually be cold. If visibility is not very good a DSMB will help the boat find you when you ascend.