Table 1.

Summary of the habitat and life history traits for each of the species included in this review

Species	Reproduction type	Depth	Substrate type	Temperature tolerance	Salinity tolerance
	Introduced range	Native and introduced ranges
Diadumene lineata	Asexual (both?)	Intertidal, shallow	Hard and Soft	Broad	Broad
Diadumene leucolena	Sexual	Shallow	Hard	Medium	Broad
Diadumene franciscana	Both	Shallow	Hard	Broad	Broad
Diadumene paranaensis	Asexual	Shallow	Hard	Medium	Broad
Metridium senile	Both	Intertidal to > 100 m	Hard	Medium	Broad
Sagartia sp. “South Africa”	Parthenogenic	Shallow	Hard	Medium	Broad
Sagartia elegans	Both	Shallow (native to 90 m)	Hard	Medium	Medium
Exaiptasia pallida	Asexual (both?)	Shallow	Hard	Medium	Broad
Anemonia alicemartinae	Asexual	< 25 m	Hard	Narrow	Narrow
Nematostella vectensis	Both	Intertidal	Soft	Broad	Broad

Reproduction type refers to the strategy recorded in the introduced range (“both” refers to asexual and sexual strategies). Depth encompasses their most commonly reported depth. Substrate type is the preferred substrate that a species can be found attaching or burrowing into. Tolerance to temperature and salinity extremes is based on our current understanding of adult tolerance throughout native and introduced ranges. Temperature categories: Narrow = restricted to stable temperatures within a single temperature zone; Medium = adapted to a more than one temperature zone; Broad = able to persist extreme temperature swings outside of native range. Salinity categories: Narrow = restricted to full ocean salinity; Medium = adapted to ephemeral salinity fluctuations; Broad = adapted to estuarine and marine conditions