[1] In 1980, it was transferred by the Dutch marine biologist Jacobus Cornelis den Hartog to the newly created genus Pseudocorynactis.

In 2010, Ocaña et al. noted the difference in tentacle development between this species and other members of the family Corallimorphidae.

[3] Paracorynactis hoplites are known to occur in coral reefs in Australia, Indonesia, Malaysia, the Marshall Islands, Papua New Guinea, Philippines, and was recently encountered in Kenya.

[4] Paracorynactis hoplites are usually attached in reef crevices and under coral ledges at a maximum depth of 28 m (92 ft).

[3] Animals with smooth shells or long spines generally seem to be rejected as prey by Paracorynactis hoplites polyps.

Paracorynactis hoplites also do not seem to be affected by the toxins of venomous echinoderms like the aforementioned crown-of-thorns starfish and the flower urchin (Toxopneustes pileolus); both of which are toxic to humans, fish, and other marine predators.

[3] Paracorynactis hoplites are also used as hosts by several symbiotic species of cleaner shrimp that aren't affected by their stinging cells.

[3] Paracorynactis hoplites may prove valuable as natural population control measures for the highly ecologically destructive crown-of-thorns starfish.