Something described as hyaline has a glassy, translucent appearance. Even some organisms with a semitranslucent appearance are called hyaline. Jellyfish, perhaps one of the world’s most recognizably hyaline organisms, are not fish. Instead, they are very simple invertebrates that are 95% water and lack internal organs beyond a nervous system called a “nerve net.” These attributes help give jellyfish their ethereal, hyaline appearance.