Starfish can live for up to 35 years in the wild. They vary in size from one centimeter to 65 centimeters depending on the species. There are 1,600 species of starfish throughout oceans around the world and different species live in habitats including tidal pools, rocky shores, sea grass, kelp beds, and coral reefs.
These jellyfish have 8 arms that surround their mouths and help them find food. Their diet consists of zooplankton, algae, shrimp, and invertebrate eggs. Although this species of jellyfish is the most venomous, they are not harmful to humans.
Butterfly fish can reach up to 8 inches in length, but typically range from around 3 to 6 inches. These fish got their name because of their coloring. They can be black, orange, yellow, silver, red, and white and have different patterns on their bodies. Many species of Butterfly fish have black stripes and spots that serve to confuse and distract their predators. Butterfly fish have elongated noses that help them reach in cracks and crevices of rocks to eat.
They have three hearts, two of which help move their blood beyond their gills. Their third heart’s function is to circulate blood to their organs. The third heart does not beat while an octopus swims, which is part of why swimming exhausts them so much and they prefer to crawl. Octopuses also have blue, copper-based blood, unlike a human’s iron-based blood. This difference in blood type helps octopuses survive in colder waters that have lower amounts of oxygen.
The Bluestripe snapper lives in tropical waters around the world. They live in coral reefs, often near caves, and in shallow lagoons. In the 1950s, the Bluestripe snapper was introduced to the waters of Hawaii as a potential food source, but their low economic value prevented them from being a continued food source.
When a Humpback whale is born, it can weigh up to 2,000 pounds and reach up to 15 feet in length. These young whales, called calves, stay with their mothers to nurse for anywhere between 6 to 10 months, until they are about 24 to 27 feet long.
Caribbean Reef Sharks are the first and only species of shark to rest or “sleep” on the ocean floors inside reef caves. Because of this, they have been given the nickname “sleeping sharks”.