What is Salp?
{{Automatic taxobox | image = Salp.jpg | image_caption = A chain of salps near the surface in the [[Red Sea]] | taxon = Salpidae | authority = Lahille, 1888 | subdivision_ranks = Subfamilies, genera and species | subdivision = See text | subdivision_ref = <ref>{{cite WoRMS |title=Salpidae |id=137217 |access-date=20 May 2021}}</ref> }} [[File:Salp colony, Aorangaia PA171899.JPG|thumb|244px| Circular ring cluster of pelagic salps]] [[File:Sea Salp Chain.jpg|thumb|244px| {{center|Salp chain}}]] [[File:23 salpchain frierson odfw (8253212250).jpg|thumb|244px|right|{{center|Another salp chain}}]] A '''salp''' is a barrel-shaped, [[plankton|planktic]] [[tunicate]]. Salps moves by contracting. This pumps water through their gelatinous bodies. It is one of the most efficient examples of [[jet propulsion]] in the animal kingdom.<ref>{{cite journal|doi=10.1111/j.1469-7998.1983.tb05071.x | volume=201 | issue=4 | title=Jet propulsion in salps (Tunicata: Thaliacea) |url=https://archive.org/details/sim_journal-of-zoology_1983-12_201_4/page/481 | year=1983 | journal=Journal of Zoology | pages=481–506 | last1 = Bone | first1 = Q.}}</ref> The salp pumps water through its internal feeding filters and feeds on [[phytoplankton]]. Salps are common in all seas. The most salps are in the [[Southern Ocean]] (near [[Antarctica]]),<ref>{{cite news|title=Now that's a jelly fish!|url=http://www.dailymail.co.uk/news/article-2543194/Fisherman-plucks-bizarre-shrimp-like-creature-water-New-Zealand-thats-completely-through.html|access-date=22 January 2014|newspaper=Daily Mail|date=22 January 2014}}</ref> where they may form enormous swarms, often in deep water. They are sometimes even more abundant than [[krill]].<ref>{{cite web|url=http://www.divediscover.whoi.edu/expedition10/index.html|title=Dive and Discover: Scientific Expedition 10: Antarctica|access-date=2008-09-03}}</ref> Although salps look similar to [[jellyfish]] with their simple body form and behaviour, in fact they are [[chordate]]s. This means they are animals with a [[dors