Seahorse Coin Necklace. We can make it any length (Between 20” and 30”) and with any chain type. This Beautiful Seahorse Coin Necklace was Sea inspired, wear it alone or with other shorter like Necklaces. The seahorse is quite a unique creature and thought to have mystical significance among the Torres Strait Island people. The Torres Strait Islanders believed that the seahorse is good fortune. The seahorse is considered to be a symbol of strength and power.