Appearance and lifestyle:
The West Coast rock lobster (Jasus lalandii) has an orange-brown colour with a spiny body and long antennae's, and they can grow up to 30cm long. They are locally known as crayfish or ‘’kreef’’, they grow very slowly and can live to the ripe old age of 50 years or so. Female rock lobsters carry their orange eggs on tiny hairs beneath their tails (this is when they are “in berry”). After 80 to 90 days, the eggs hatch and produce tiny transparent spider-like larvae (naupliosoma). These larvae moult and become phyllosoma larvae with long, hairy legs.
Habitat:
Found in Southern Africa in rocky reefs and kelp forest beds, they can be found in intertidal zones down at 46m deep.
Diet:
West Coast rock lobsters are an important link in the kelp forest food chain. As carnivores, they tuck into mussels, urchins, starfish, abalone (perlemoen), and even barnacles. Where they occur in masses, they have been known to devour entire populations of sea urchins, for example. However, rock lobsters are also a target for other predators: They are hunted by octopuses, dogsharks, seals and humans.
Recreational crayfishers
Recreational fishers take out about 69 tonnes per year. This is a substantial amount, and recreational fishers should ensure they and others keep to the regulations. This will ensure that the fishery remains sustainable and that they can continue to enjoy this pastime.
Support these regulations
Make sure you know when the season for West Coast rock lobster opens and only fish for them during this time. Get a permit for West Coast rock lobster from your local post office. Only four West Coast rock lobsters are allowed per person per day. You may not sell your catch, and you must transport the lobsters in their whole state. Only crayfish with a minimum size of 80mm may be removed from the sea. You may not take out female lobsters that are in berry. Return them to the sea immediately. For more information, visit Home | Department of Forestry, Fisheries and the Environment
The impact of red tide
Red tide (decaying phytoplankton blooms) often occurs in areas where large numbers of West Coast rock lobster occur. Red tide causes oxygen levels to drop dramatically, and the rock lobsters move inshore, searching for oxygenated water. They are often left stranded by the receding tide, resulting in what is mistakenly referred to as a “rock lobster walkout”. In 1997, the largest-ever stranding of rock lobster occurred in Elands Bay. An estimated 2 000 tons of rock lobster was lost as a result.
Threats:
In earlier years, the South African rock lobster fishery would catch about 4 000 tonnes of lobster per year. The fishery has declined dramatically in recent years due to slow growth rates of the lobsters and illegal fishing activities.
Today, the commercial fishery harvests less than 2 000 tonnes of rock lobster, contributing about R200 million to the economy every year.
SASSI status – Red (don't buy).