Tan to black; often with tiny white dots. To 11 inches. A deep-water species, Kelloggi seahorses are unsuitable for captive life. Typically raised in Asia in overcrowded net pens or cramped tanks which expose them to stress and disease, they are not ready for life in captivity, unlike true captive-bred species. Few aquarists, including experts, have been able to keep them alive longer than a few months.