H. Whitei is 4"-5". They have lots of what is called cirri (Small fuzzy prickles for hiding!). It just means they are slightly hairy fuzzy in random patterns, as a camouflage technique. They are often white or yellow tinted, and they have the common name "Golden Seaponie". Range is Eastern Australia. Fish To The Nth should have this seahorse available for you captive bred in the future. However, they are cold water seahorses.