it is not ban. please see below from cna:
Stricter AVA control as seahorses included in CITES from May 15
SINGAPORE : The Agri-food and Veterinary Authority of Singapore (AVA) said the trading of seahorses in Singapore would be strictly governed next month.
From May 15, any import and export of seahorses will come under the Convention of International Trade in Endangered Species of Wild Fauna and Flora (CITES).
Seahorse s are largely in demand by seafood traders, aquarium dealers and Traditional Chinese Medicine (TCM) dealers.
Last year, 47,700 live seahorses worth about $40,000 were imported for aquaria trade.
TCM practioners import some two tonnes of dried seahorses annually worth about $170,000.
They are used as an ingredient in products to cure ailments such as asthma, swelling and impotence.
The AVA hopes such measures will help conserve the species. - CNA