sentence: Some species are thought to use either sticky threads or hooked spicules.
sentences_before: A few species live in waters where there is very little food available. They have therefore changed, and became predators. They prey on small crustaceans and other small animals. Most of these sponges belong to the family Cladorhizidae, but a few members of the Guitarridae and Esperiopsidae are also carnivores. In most cases little is known about how they actually capture prey.
concept_name: specie
headings: Sponge Life functions Carnivorous sponges
categories: Basic English 850 words