General: Individual zooids link together in a chain. Common stolon links individual zooids together. Zooids ovate, almost spherical, in shape with five girdling muscle bands and a thick tunic. Gut is U-shaped. Buccal siphon often hosts hydroids of Bythotiara dolioeques in mutualistic symbiosis.
Size: Individual zooids to 22 mm. Total colony length to 4.5 m.
Habitat description: Mesopelagic.
Published depth range: 80 - 550 m, most common 300 - 400 m.
Color: Tunic and body wall typically transparent, with some zooids exhibiting small, irregularly shaped patches of bright orange pigment.
Looks like: Salp chain.
ReferencesEncyclopedia of Life
Tree of Life
World Register of Marine Species
National Center for Biotechnology Information
Robison, B.H., K.A. Raskoff, and R.E. Sherlock (2005). Ecological substrate in midwater: Doliolula equus, a new mesopelagic tunicate. Journal of the Marine Biological Association of the United Kingdom, 85: 655-663. http://dx.doi.org/10.1017/S0025315405011586
Martini, S. and S.H.D. Haddock (2017). Quantification of bioluminescence from the surface to the deep sea demonstrates its predominance as an ecological trait. Scientific Reports, 7: 45750. https://doi.org/10.1038/srep45750
Citation: Doliolula equus (unknown) Deep-Sea Guide (DSG) at http://dsg/mbari.org/dsg/view/concept/Doliolula%20equus. Monterey Bay Aquarium Research Institute (MBARI). Consulted on 2021-09-24.