ok here is some law
Marine Living Resources act, 1998 (Act no. 18 of 1998 ).
(18 ) The holder of a recreational fishing permit endorsed for marine aquarium fishing shall not engage in fishing for, or be in possession of:
(a) any fish listed in the prohibited species list of Anexure 9;
(b) more than five fish per species, or more fish than the bag-limit listed in respect of each species in the permitted species list of Annexure 7 during any one day, whichever is the lesser quantity (Annexure 7 is a list of angling fish, minimum sizes and bag limits).
(19) The holder of a recreational fishing permit endorsed for marine aquarium fishing shall:
(a) immediately transfer all fish caught on the authority of this permit to a saltwater aquarium or saltwater holding facility of sufficient capacity to sustain the lives of the fish;
(b) keep a log-book indicating all additions to the aquarium (including those bred or hatched in the aquarium) and losses, indicating the species, origin and cause of loss.
Annexure 9 ? Prohibited species.
Hard corals (Order Scleractinia)
Sea fans (Order Gorgonacea)
Sea pens (Order Pennatulacea)
Sand dollars (Echinodiscus spp.)
Giant clams (Tridacna spp.)
Abalone (Haliotus midae)
Rock lobsters (Family Palinuridae)
Seahorses and pipefish Family Syngnathidae
Coelacanth (Latimeria chalumnae)
Seventy four (Polysteganus undulosus)
Brindle bass (Promicrops lanceolatus)
Potato bass (Epinephelus tukula)
Natal wrasse (Anchichoerops natalensis)
Great white shark (Charcarodon carcharias)
Marine mammals
(seals, dolphins and whales, Class Mammalia)
In addition there is more fine print on the lower part of the permit:
NOTE:
2. No more than 10kg Aquatic Plants and 10 Aquarium Fish shall be collected per day.
GENERAL PERMIT CONDITIONS:
4. Fish caught or collected in terms of this permit may not be sold, bartered or traded.