It is found in the Indo-pacific region, specifically documented from the coast of East Africa to Japan.
Their mating ritual involves twisting their tails and head nods, until they find a partner.
It's one of the harder types to purchase and care for, as it is large and does not compete well with others for food, often resulting in early death.
One of the major reasons the great seahorse is removed from captivity is due to its medicinal effects in China and other east Asian countries.
Aside from personal aquariums and medicine, the great seahorse is also used as a souvenir, often available dried for people to take home.
[1] The specific name honours the American entomologist and evolutionary biologist Vernon Lyman Kellogg 1867-1937.