Sea otters for one.
the purple sea urchin
Sea urchin spikes are called "spines." These spines are made of calcium carbonate and serve various purposes, including protection from predators and aiding in locomotion. They can vary in size, shape, and color depending on the species of sea urchin. Additionally, some species have venomous spines that can deliver a painful sting.
The most common predators of sand dolars are ocean pouts and sunflower starfish. Sand dollars do not have many predators.
Urchin (sea urchin) umbrella-fish
Respiratory tree is present in echinoderms eg. sea urchin it helps in respiration and protection from predators by evisceration .
the sea urchin has many adaptions like its spikes to protect it self from predators.
There are over 700 species of Sea urchins. Some examples would be the pincushion sea urchin, the popular and common longspine urchin, the Blue Tuxedo urchin, the shortspine urchin and the pencil urchin. They usually differ in color, location most common and overall look or how long their spines are.
i want to find what are some spiny bodied invertebrates? Se urchin, starfish are a couple.
aristotle's lantern
Sea urchin populations are primarily affected by predator dynamics, particularly the presence of sea otters, which help keep their numbers in check. Overfishing of these predators and environmental changes can lead to sea urchin overpopulation, resulting in "urchin barrens" where kelp forests are devastated. Additionally, factors such as water temperature, nutrient availability, and pollution can influence both sea urchin reproduction and kelp health, further impacting the balance of these ecosystems. The interplay between these elements is crucial for maintaining healthy kelp forests.
What does an urchin look like?The Urchin is a spiky animal that lives in the Ocean.
The classification of a Sea Urchin is Echinoidea