David Knott

Poseidon Taxonomic Services, LLC

Address: 1942 Ivy Hall Rd., Charleston, SC 29407
Phone: 843.442.0795
E-mail: david.knott@why-knott.com


M.S., Marine Biology, 1980, College of Charleston

B.A., Biology, 1972, University of Pennsylvania

Research Interests

  • Taxonomy and ecology of benthic and planktonic invertebrates from coastal and continental shelf habitats in the southeastern US
  • Invasive and non-indigenous species

Current and planned research projects

  • assessment of the occurrence, establishment and impacts of Asian tiger shrimp, island apple snails, marine mussels, and other nonindigenous aquatic invertebrates in the southeastern US
  • taxonomy, systematics and identification of estuarine and marine planktonic larval crustaceans and benthic macroinvertebrates, with particular interest in peracarid and decapod crustaceans, cirripedes, stomatopods, mollusks, echinoderms, scyphozoans, and polychaetous annelids
  • retired senior biologist with 33 years of work experience with the Marine Resources Research Institute, Marine Resources Division, South Carolina Department of Natural Resources


  • Underwood, E.B., Darden, T.L., Knott, D.M. and Kingsley-Smith, P.R. 2019. Determining the salinity tolerance of invasive island apple snail, Pomacea maculata (Perry, 1810) hatchlings to assess the invasion probability in estuarine habitats in South Carolina, USA. Journal of Shellfish Research 38(1): 177-182.
  • Gooding, E.L., Fowler, A.E., Knott, D.M., Dillon, Jr., R.T., Brown, T., Kendrick, M.R. and Kingsley-Smith, P. R. 2018. Life history and phenological characteristics of the invasive island apple snail Pomacea maculata (Perry, 1810) in stormwater retention ponds in coastal South Carolina, USA. Journal of Shellfish Research 37:229-238.
  • Hubbard, I.M., Hill-Spanik, K.M., Knott, D. and De Buron, I. 2016. Development of Anguillicoloides crassus in a cyclopoid copepod from the Acanthocyclops robustus–americanus–vernalis complex in South Carolina, USA. Comparative Parasitology 83(2): 192-196.
  • Fuller, P.L., Knott, D.M., Kingsley-Smith, P.R., Morris, J.A., Buckel, C.A., Hunter, M.E. and Hartman, L.D. 2014. Invasion of Asian tiger shrimp, Penaeus monodon Fabricius, 1798, in the western north Atlantic and Gulf of Mexico. Aquatic Invasions 9(1): 59-70. doi: http://dx.doi.org/10.3391/ai.2014.9.1.05
  • de Buron, I., Roth, P.B., Bergquist, D.C., and Knott, D.M. 2013. Mulinia lateralis (Mollusca: Bivalvia) die-off in South Carolina: discovery of a vector for two elasmobranch cestode species. Journal of Parasitology 99(1): 51-55.
  • Knott, D.M., P.L. Fuller, A.J. Benson, and M.E. Neilson, 2017, Penaeus monodon: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=1209, Revision Date: 6/5/2012, Access Date: 10/6/2017 2
  • DeVictor, S.T., Knott, D.M. and Crowe, S.E. 2010. South Carolina Beachcomber’s Guide: a guide to the common invertebrates, plants and natural artifacts of the South Carolina seashore. South Carolina Department of Natural Resources. 91 pp.
  • Whitaker, J.D., King, R. and Knott, D. undated. Sea Science – Jellyfish; An Information/Education Series from the Marine Resources Division, SC Department of Natural Resources. 6pp.
  • Harrison, J.R. and Knott, D.M. 2007. Occurrence of Microtralia ovula and Creedonia succinea (Gastropoda: Pulmonata: Ellobiidae) in South Carolina. Southeastern Naturalist 6(1): 173-178.
  • Heard, R.W., King, R.A., Knott, D.M., Thoma, B.P. and Thornton-DeVictor, S. 2007. A guide to the Thalassinidea (Crustacea: Malacostraca: Decapoda) of the South Atlantic Bight. NOAA Professional Paper NMFS 8. 30pp.
  • Negreiros-Fransozo, M.L., Wenner, E.L., Knott, D.M. and Fransozo, A. 2007. The megalopa and early juvenile stages of Calappa tortugae Rathbun, 1933 (Crustacea, Brachyura) reared in the laboratory from South Carolina neuston samples. Proceedings of the Biological Society of Washington 120(4): 469-485.
  • Heard, R.W., Price, W.W., Knott, D.M., King, R.A. and Allen, D.M. 2006. A taxonomic guide to the mysids of the South Atlantic Bight. NOAA Professional Paper NMFS 4. 37pp.