Elysia clarki

  • E. clarki eating fresh Avrainvillea
  • Baby E. clarki, dorsal view
  • E. clarki in Box of Slugs 1.0
  • E. clarki in Bryopsis feeding posture
  • E. clarki on Bryopsis; Botryocladia in background
  • Trio of E. clarki on afternoon climb
  • Baby Elysia clarki, ventral view. 2/27/15
  • Larva crawling in dish 11/6/14
  • Veliger crawling on Bryopsis.
  • Very small E. clarki in Box of Slugs 2.0. 2/24/15
  • Adult E. clarki 2/5/15
  • New girls in growout tank, 4/18/15.
  • E. clarki eggs on Udotea in Box of Slugs 1

Description: A large species, reaching roughly 5 cm when fully extended.  E. clarki resembles E. crispata, with which its range partially overlaps.  However, they can be distinguished based on several features unique to E. clarki.  These include lack of overlap of parapodia at the anterior end, and smaller spots on the body which extend onto the base of the foot (Pierce et al., 2006; a beautiful set of photos showing the differences can be found here at the Sea Slug Forum).  This species is commonly sold as “lettuce nudibranch” by online suppliers in North America.  It is currently featured in the “Box of Slugs” part of the blog, which highlights observations on the feeding and social behaviors of solar slugs in my office in Rockville, MD.

Distribution: Florida Keys (Pierce et al., 2006).

Food plants: Bryopsis, Penicillus, Halimeda

Kleptoplasty: Long-term

Scientific Literature

Curtis, N.E., Middlebrooks, M.L., Schwartz, J.A., Pierce, S.K. (2015) Kleptoplastic sacoglossan species have very different capacities for plastid maintenance despite utilizing the same algal donors. Symbiosis, 65 (1), pp. 23-31 [F] [K] [Cl] [Pp]

Christa, G., Händeler, K., Kück, P., Vleugels, M., Franken, J., Karmeinski, D., Wägele, H. (2014) Phylogenetic evidence for multiple independent origins of functional kleptoplasty in Sacoglossa (Heterobranchia, Gastropoda). Organisms Diversity and Evolution, 15 (1), pp. 23-36 [K] [F] [Cl] [Pp] [Pt] [Zu]

Middlebrooks, M.L., Bell, S.S., Curtis, N.E., Pierce, S.K. (2014) Atypical plant-herbivore association of algal food and a kleptoplastic sea slug (Elysia clarki) revealed by DNA barcoding and field surveys. Marine Biology, 161 (6), pp. 1429-1440.

Middlebrooks, M.L., Bell, S.S., Curtis, N.E., Pierce, S.K. (2014) Atypical plant-herbivore association of algal food and a kleptoplastic sea slug (Elysia clarki) revealed by DNA barcoding and field surveys. Marine Biology, 161 (6), pp. 1429-1440.  Abstract [F] [K] [Cl]

Middlebrooks, M.L., Bell, S.S., Pierce, S.K. (2012) The kleptoplastic sea slug Elysia clarki prolongs photosynthesis by synthesizing chlorophyll a and b. Symbiosis, 57 (3), pp. 127-132. Page1 [HT] [K] [Cl]

Middlebrooks, M.L., Pierce, S.K., Bell, S.S. (2011) Foraging behavior under starvation conditions is altered via photosynthesis by the marine gastropod, Elysia clarki. PLoS ONE, 6 (7), art. no. e22162.  PDF [BN] [K] [Cl]

Curtis, N.E., Schwartz, J.A., Pierce, S.K. (2010) Ultrastructure of sequestered chloroplasts in sacoglossan gastropods with differing abilities for plastid uptake and maintenance. Invertebrate Biology, 129 (4), pp. 297-308. Abstract [K] [Cl] [Ru] [Pa]

Curtis, N.E., Pierce, S.K., Massey, S.E., Schwartz, J.A., Maugel, T.K. (2007) Newly metamorphosed Elysia clarki juveniles feed on and sequester chloroplasts from algal species different from those utilized by adult slugs. Marine Biology, 150 (5), pp. 797-806. PDF [F] [K] [Cl]

Pierce, S.K., Curtis, N.E., Massey, S.E., Bass, A.L., Karl, S.A., Finney, C.M. (2006) A morphological and molecular comparison between Elysia crispata and a new species of kleptoplastic sacoglossan sea slug (Gastropoda: Opisthobranchia) from the Florida Keys, USA.  Molluscan Research, 26 (1), pp. 23-38. Abstract [F] [K] [NH] [Cr] [Cl]

Curtis, N.E., Massey, S.E., Pierce, S.K. (2006) The symbiotic chloroplasts in the sacoglossan Elysia clarki are from several algal species. Invertebrate Biology, 125 (4), pp. 336-345.HTML [F] [K] [Cl]

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