[1] Pierre André Latreille erected the genus Stenorhynchus (originally mis-spelt Stenorynchus) in 1818,[1] and S. seticornis was confirmed as the type species by the International Commission on Zoological Nomenclature in 1966.

[5] This species presents as diagnostic features: triangular body with long pointed snout (rostrum), carapace decorated with fine dark lines and claws often have violet tips.

[6] Stenorhynchus seticornis is commonly found in the shallow sub-tidal on rock bottoms, corals, calcareous algae, and also on soft sediments, such as shelly gravel and sand.

[7] Stenorhynchus seticornis is found in the western Atlantic Ocean, from North Carolina and Bermuda to Brazil, including throughout the Caribbean Sea,.

[9] The species has displayed notable negative phototaxis, meaning the organism prefers to avoid sunlight,[10] and changes location during the day and nighttime.

[6] This is a somewhat unexpected relationship as moray eels and squirrelfish can be considered dangerous clients, because crabs are important elements of their diets.

Seasonal variation of water temperature and sunlight duration are considered as the most important variables determining the breeding period of arrow crabs.