Sebastapistes galactacma
| Sebastapistes galactacma | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Scorpaenidae |
| Genus: | Sebastapistes |
| Species: | S. galactacma
|
| Binomial name | |
| Sebastapistes galactacma Jenkins, 1903
| |
Sebastapistes galactacma, commonly known as the milky scorpionfish, is a species of scorpionfish found in the tropical Pacific.[1] The name Sebastapistes conveys a sense of caution and respect as it hints towards the venomous nature of the scorpionfish. The name of this genus stems from the Greek language.[2] It is a compound word of the terms sebastes, which translates into "august" or "venerable", and apistia, which means "distrust".[2]
Description
The milky scorpionfish (Sebastapistes galactacma) is distinguishable by its reddish base color and numerous white dots densely distributed on its body.[3] The first description of the fish was made by ichthylogist Oliver P. Jenkins, who described the resemblance of the scorpionfish's white dots to the stars in the Milky Way. [3] This led Jenkins to name the species galactacma, which uses a variant of the Greek word "galactos," that translates to "milky," as a base for the species name.[3]
Like other species of scorpionfish, S. galactacma is distinguishable by two spines connected to a lacrimal bone, a small bone structure that forms part of the fish's eye socket.[4] Milky scorpionfish grow to be around 1in-3in and can have either cycloid or emarginate scales.[5][3][4] It is worth noting that only members of this species in Micronesia have emarginate scales.[5] Cycloid scales on the scorpionfish are smooth-edged and round/oval-shaped.[6] In contrast, emarginate scales are slightly indented and notched.[7]
Distribution and habitat
Milky scorpionfish are found in Central Pacific waters and are commonly found in Hawaiʻi, Rapa Nui, Pohnpei, and Guam.[5] This species is known to be a reef-dwelling fish that inhabits sections of the reef facing the open ocean.[5][3] They are also described as benthic organisms, meaning they live on or near the seafloor, and occupy rubble areas and corals.[3] The exact range of depth of milky scorpionfishes is not known because of their cryptobenthic nature.[5][8] But based on the available data on this species, their estimated range of depth is between 4 m (13 ft) and 200 m (656 ft).[5][8]
Hawaiian Population
Surveys of bays in Hawaiʻi have given insight into the possible population density of milky scorpionfish in the state.[9] In Hawaiʻi, they tend to reside in rubble habitats and a small, branching coral called Pocillopora meandrina, commonly known as cauliflower coral.[8] In these habitats, the milky scorpionfish shares its coral habitat with the closely related species Sebastapistes coniorta.[8]
References
- ^ "WoRMS - World Register of Marine Species - Sebastapistes galactacma Jenkins, 1903". www.marinespecies.org. Retrieved 2025-11-07.
- ^ a b "Sebastapistes perplexa summary page". FishBase. Retrieved 2025-11-24.
- ^ a b c d e f "sebastapistes galactacma galactic scorpionfish". www.hawaiisfishes.com. Retrieved 2025-11-20.
- ^ a b Poss, Stuart G. (1999), The living marine resources of the Western Central Pacific. 4: Bony fishes part 2 (Mugilidae to Carangidae) (PDF), Rome: Food and Agriculture Organization of the United Nations, pp. 2291–2315, ISBN 978-92-5-104301-1, retrieved 2025-11-12
{{citation}}: CS1 maint: url-status (link) - ^ a b c d e f "Sebastapistes galactacma summary page". FishBase. Retrieved 2025-11-24.
- ^ "Molecular Expressions Microscopy Primer: Specialized Microscopy Techniques - Differential Interference Contrast Image Gallery - Cycloid Fish Scale". micro.magnet.fsu.edu. Archived from the original on 2025-09-07. Retrieved 2025-12-04.
- ^ Bowling, Brenda. "Glossary of Fish Terms". Fish Glossary. Texas A&M University at Galveston. Retrieved 2025-12-02.
{{cite web}}: CS1 maint: url-status (link) - ^ a b c d Jones, Ryan N. (2024-10-01). "Habitat partitioning by two coral-dwelling scorpionfishes in Hawai'i". Coral Reefs. 43 (5): 1549–1561. doi:10.1007/s00338-024-02559-9. ISSN 1432-0975.
- ^ Greenfield, David W. (2003). "A Survey of the Small Reef Fishes of Kane'ohe Bay, O'ahu, Hawaiian Islands" (PDF). Pacific Science. 57 (1): 45–76. doi:10.1353/psc.2003.0001. ISSN 1534-6188.