Evasterias troschelii is a species of starfish in the family Asteriidae. Its common names include the mottled star, false ochre sea star and Troschel's true star. It is found in Kamchatka and the north western coast of North America.

Taxonomy The description of this species was first formally published in 1862 by William Stimpson under the name Asterias troschelii (Stimpson first presented the new species in a lecture at the Boston Society of Natural History in 1861). The holotype was collected in Puget Sound, Washington. Only part of one arm still remains of this smallish specimen at the United States National Museum. It was moved to the new genus Evasterias by Addison Emery Verrill in 1914, with as the type species. Verrill published five new varieties (alveolata, densa, parvispina, rudis and subnodosa) besides the nominate variety, and also published E. acanthostoma in 1914. Alexander Michailovitsch Djakonov synonymised all of Verrill's varieties, but retained alveolata as a forma, and also made Verrill's E. acanthostoma a form of E. troschelii, leaving the species with three forms including the nominate.

The mottled star is a large starfish with a radius of up to 28 centimetres (11 in).