![]() ![]() ![]() These filter-feeding animals also have efficient ways of trapping and engulfing small organisms or organic matter such as bacteria and detritus.Ĭnidarians (jellyfishes, sea anemones and corals) are mainly suspension feeders which use tentacles for hunting prey like zooplankton, prawns and other small fishes although some species can actively pursue invertebrate prey by tracking them down with their tentacles or shoot darts at larger animals like fish or squid. Sponges can range in size from the gigantic barrel sponge to smaller species that measure no more than 1/100th of an inch (0.25mm). The choanosome of the sponge contained higher protein levels, but revealed no structural defense.Although sponges lack a digestive system or other complex organs, they use specialized feeding structures called choanocytes that line their bodies to capture food particles from the water. Our results demonstrated that chemical defense is evenly distributed throughout the sponge and works in conjunction with a structurally defended ectosome to further reduce predation levels. ![]() ĭoes a sponge protect itself does it have any defenses? The fishes that feed on sponges are thought to have evolved relatively recently, suggesting that competition forced them to eat a less- preferred food source. In fact, doridacean nudibranchs, together with some fishes (trunkfishes, angelfishes and filefishes), are important predators of sponges. How do Demosponge protect themselves? What is one of the principal predators of a sponge? A few species of fish, seaslugs and hawksbill turtles eat sponges, many sponge species contain toxic substances as well as sharp spicules to discourage predators. Most sponges are filter feeders, eating bacteria and other food particles in the water. What do sponges use for defense and feeding? Digestion of the food particle takes place inside the cell. ![]() The food particles are caught by the collar of the choanocyte and brought into the cell by phagocytosis. The sponges draw water carrying food particles into the spongocoel using the beating of flagella in the choanocytes. How does a sponge obtain and digest food? ![]()
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