The tentacles have a rounded tip and the end may be green, yellow, gray, or rarely, blue and pink.

The column, external structure of an anemone visible when the animal is closed, has small, non-adhesive bumps (verrucae) which are usually the same color as the column and not visible.

[1] S. haddoni is found on sandy surfaces and is widespread throughout the tropical and subtropical waters of the Indo-Pacific area from Mauritius to Fiji and from the Ryukyu Islands of southern Japan to Australia.

The first is internal via photosynthesis of its symbiotic zooxanthellae, living in its tissues.

On some islands, such as Ko Samui or Ko Pha-ngan, these sea anemones are used as an ingredient in a local seasonal dish called Kaeng kua (แกงคั่ว), even though they are protected animals in Thailand.