What kind of tunicates live in the Caribbean?
The most common types of tunicates found in the Caribbean, in areas around St.John, are the bluebell tunicate and the strawberry tunicate. Tunicates belong to the phylum Urochordata, which is closely related to phylum Chordata that includes all vertebrates.
How are tunicates a sister group of vertebrates?
Gene sequencing supports the idea that tunicates are a sister group of vertebrates. During their tadpole like larval stage they show features that can be seen other vertebrates, this allows tunicates to be model organisms for scientist to understand the development of vertebrates and immunity of vertebrates.
How are tunicates able to orient themselves as they swim?
Tunicates during their larval stage also contain gravity and light-sensitive sensory vesicles, this gives them the ability to orient themselves as they swim. However, later in life the organism reabsorbs the tail, notochord and dorsal nerve cord as a source of food.
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Where does the mucus in a tunicate come from?
They have cilia in the pharynx and they also produce mucus. Their food gets stuck in the mucus and with the help of beating cilia the mucus moves toward the digestive system. There are also predatory tunicates, which eat small creatures that get pulled through their siphon and get stuck on their mucous.
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What kind of animal is a Blue Bell tunicate?
Clavelina moluccensis, common name bluebell tunicate, blue bell tunicate, or Blue Sea Squirt is a species of tunicate (sea squirt), in the genus Clavelina (the “little bottles”). Like all ascidians, these sessile animals are filter feeders .
What kind of fish is a Blue Bell?
Clavelina moluccensis, common name bluebell tunicate, blue bell tunicate, or Blue Sea Squirt is a species of tunicate (sea squirt), in the genus Clavelina (the “little bottles”).
Where are the blue spots on a Clavelina?
This species is 0.5-2.5 cm long, and light to medium blue in colour. The top of the zooids contain characteristic dark blue patches and spots that are always visible. This species is found in the waters around Australia, Western Pacific, Indonesia, Papua New Guinea, Mariana Islands, Philippines, Singapore, and Malaysia.