sentences:  Also known as chloroplast symbiosis, kleptoplasty is the energy-providing mechanism that gives the Sacoglossan’s the nickname, “solar-powered sea slugs”, and "E. crispata" the name, “lettuce sea slug.” As algal food is being digested, the chloroplasts are absorbed into the cells lining the digestive tract and up into their parapodia.How many chloroplasts the slug sequesters and the length of retention depends on the individual species of slug.Chloroplast retention in "E. crispata" tends to last around 40 days.