Stenopodidea

Stenopodidea can be distinguished from Caridea (true shrimp) by their greatly enlarged third pair of legs rather than the first. They differ from Dendrobranchiata prawns by possessing non-branching gills and by brooding eggs rather than releasing them directly into the water. Unlike reptant decapods such as lobsters and crabs, stenopodideans retain a more shrimp-like body form while sharing the enlarged third pereiopod characteristic.

Stenopodideans possess a robust body plan with a notably enlarged third pair of pereiopods (walking legs), which distinguishes them from other decapod groups where the first pereiopod is typically enlarged. They lack the branching gills characteristic of Dendrobranchiata prawns. The rostrum varies in shape among species, ranging from lanceolate to more complex forms with ventral blades and notches. Eyestalks may bear distinctive processes, such as the spinulose process at the anteromesial angle found in some Spongicola species. Color patterns are often diagnostic at the species level.

Most stenopodideans are associated with marine benthic environments, particularly coral reefs and deep-water habitats. Members of the family Spongicolidae are predominantly associated with hexactinellid (glass) sponges, with some species inhabiting the internal spaces of sponge colonies. One species, Spongicola kabuki, has been documented inhabiting antipatharian (black coral) colonies, representing an unusual host association for the genus. Depth ranges vary considerably, from shallow coral reefs to depths exceeding 286 meters.

Stenopodidea has a global marine distribution with highest diversity in the Indo-West Pacific region. Documented occurrences include: the tropical western Atlantic and Caribbean; the tropical eastern Atlantic including Cabo Verde; the Mediterranean Sea; the Red Sea; the Indo-West Pacific from South Africa and Madagascar through Southeast Asia to Australia, Japan, and the Ryukyu Archipelago; and the Pacific islands including the Mariana Islands, Marshall Islands, French Polynesia, and Tuamotu Islands. The southernmost record is from approximately 54° South on the Macquarie Ridge near New Zealand.

• Hexactinellida - habitatMost Spongicolidae species are associated with glass sponges
• Antipatharia - habitatSpongicola kabuki documented from antipatharian coral colony, an unusual host for the genus

Several species, particularly in the genus Stenopus, are collected for the marine aquarium trade due to their striking coloration and active behavior. Stenopus hispidus and related species are marketed as ornamental 'boxer shrimp' or 'banded coral shrimp' in the aquarium industry. The group has also been subject to taxonomic confusion with true shrimp and prawns, leading to misidentification in fisheries and biological surveys.

• CarideaTrue shrimp share general body form but differ in having the first rather than third pereiopod enlarged, and represent a separate infraorder within Pleocyemata
• DendrobranchiataPrawns share superficial shrimp-like appearance but possess branching gills and release eggs directly into water rather than brooding them

Stenopodidea are frequently misidentified as shrimp or prawns in both scientific and popular literature. Their common names 'boxer shrimp' and 'coral shrimp' perpetuate this confusion. However, molecular and morphological evidence places them in a distinct lineage separate from both Caridea and Dendrobranchiata, more closely related to reptant decapods such as lobsters and crabs.

• crustacean
• decapod
• marine
• benthic
• coral reef
• deep sea
• sponge associate
• ornamental aquarium species

• BugGuide
• Wikipedia
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• A new species of Microprosthema Stimpson, 1860 (Crustacea: Decapoda: Stenopodidea: Spongicolidae) from the South China Sea
• Integrative Taxonomy of New Zealand Stenopodidea (Crustacea: Decapoda) with New Species and Records for the Region
• Two new species and new records of Microprosthema Stimpson, 1860 (Crustacea: Decapoda: Stenopodidea: Spongicolidae) from the Indo-West Pacific
• New records of marine ornamental shrimps (Decapoda: Stenopodidea and Caridea) from the Gulf of Mannar, Tamil Nadu, India
• A distinctive new species of spongicolid shrimp assigned to the genus Spongicola De Haan, 1844 (Decapoda: Stenopodidea) from the Ryukyu Islands, Japan
• Redescription of Microprosthema semilaeve (von Martens, 1872) (Decapoda: Stenopodidea: Spongicolidae) and description of a new species of Microprosthema from Dry Tortugas, Florida
• The first records of Microprosthema pernambucensis (Bochini, Cunha, Terossi & Almeida, 2020) and Odontozona addaia Pretus, 1990 from the tropical eastern Atlantic (Decapoda: Stenopodidea)