Jellyfish range in size from as tiny as a pinhead to larger than a human with diets that vary accordingly. Jellyfish feed on phytoplankton, copepods, fish eggs, larvae and even other jellyfish. They form large swarms known as blooms that eat almost everything in the water around them. Most jellyfish species passively hunt and eat whatever tangles in their tentacles, but some swim and chase their prey.
Found in both fresh and saltwater and in every ocean at various temperatures and depths, jellyfish have evolved a highly sensitive nervous system designed to help them hunt. They have a simple digestive system with a gastrovascular cavity and an opening that functions as the mouth. Jellyfish are largely carnivorous, their tentacles lined with stinging capsules or venom that stuns their prey. The arms around the opening catch and bring their prey to the jellyfish's mouth, and the digestive process begins almost immediately. Jellyfish excrete waste through this opening as well. Some species are aggressive and have potent venom in their tentacles that paralyzes or kills their prey. The box jellyfish in particular is an excellent and swift swimmer. Other species are filter feeders, consuming seawater and whatever edible items it contains, including zooplankton, eggs and larvae.Learn More
The box jellyfish lives in the eastern Indian Ocean and the southwestern Pacific Ocean. The Australian box jellyfish lives off the northern coast of Australia.Full Answer >
Light-colored walls, mirrors, ample lighting and glass shower doors make small bathrooms seem larger. Additionally, an over-the-toilet vanity provides extra storage in a compact space. Effective design ideas for tiny bathrooms create the illusion of space and pack multiple functions into every feature.Full Answer >
Topneck clams are a species of hard-shell clams found on the East Coast of the United States, where hard-shell clams are sold by size. Topneck clams are about 2 inches wide. Though each size range has a different name and preferred preparation method, the species of clam is the same -- the hard, or northern, quahog clam.Full Answer >
Octopuses vary in size according to species, but the common octopus grows between 12 and 36 inches in length and weighs up to 22 pounds. The giant Pacific octopus is the largest of member of the octopus family and can weigh more than 150 pounds.Full Answer >