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Sydney marine life

White’s seahorse

Also known as the Sydney seahorse, White’s seahorse lives in sheltered bays and estuaries on the NSW coast, much of it in and around Sydney Harbour and Botany Bay.

  • Up to about 13 cmSize
  • Year roundBest time
  • EndangeredStatus
A White’s seahorse holding on to a sponge

Hippocampus whitei

Photo: Malcom Nobbs

What to look for

A small seahorse holding on with its tail to a sponge, soft coral, seagrass or the netting of a harbour swimming enclosure. Colours range from pale yellow to dark brown, and they can change colour to match their surroundings. They mostly stay within a small home range, so once one is found it’s often seen on the same spot for months.

Endangered and protected

White’s seahorse is listed as endangered in NSW, mainly because of the loss of the soft corals, sponges and seagrass it lives on. Look but never touch, don’t move them for a photo, and keep your fins well clear of the bottom and the nets.

Where to see it

Dive with us to see it

You might also see

All Sydney marine life →