Fiery Nudibranch – Okenia amoenula

, Fiery Nudibranch, Okenia amoenula
Depth: 1 - 30 m

Afghanistan, Alaska, Algeria, Andaman and Nicobar, Angola, Antarctica, Antigua and Barbuda, Arctic, Argentina, Ascension Island, Australia, Austria, Azerbaijan, Azores Islands, Bangladesh, Belarus, Bolivia, Bosnia and Herzegovina, Brazil, Brunei Darussalam, Bulgaria, Cambodia, Cameroon, Canada, Canary Islands, Cayman Islands, Central African Republic, Chile, China, Cocos Islands, Comoros, Congo, Cook Islands, Corsica Island, Crete Island, Croatia, Curaçao, Cyprus, Czech Republic, Democratic Republic of the Congo, Denmark, El Salvador, England, Equatorial Guinea, Falkland Islands, Faroe Islands, Finland, France, French Polynesia, Gabon, Galapagos Islands, Germany, Ghana, Gibraltar, Greece, Greenland, Guinea, Guinea-Bissau, Hawaii, Honduras, Hungary, India, Indonesia, Iran, Iraq, Ireland, Italy, Ivory Coast, Japan, Kazakhstan, Kyrgyzstan, Laos, Macedonia, Madagascar, Madeira Islands, Malawi, Marshall Islands, Mauritius, Mexico, Micronesia, Moldova, Morocco, Mozambique, Myanmar, Namibia, New Zealand, Nicaragua, Nigeria, Norfolk Island, North Korea, Northern Ireland, Norway, Oman, Pakistan, Palestine, Papua New Guinea, Peru, Philippines, Poland, Portugal, Reunion Island, Romania, Russia, Saint Martin, São Tomé and Príncipe, Sardinia Island, Scotland, Senegal, Serbia, Sicily Island, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Georgia And The South Sandwich Islands, South Korea, Spain, Sweden, Taiwan, Tajikistan, Tanzania, Tonga, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Ukraine, United Kingdom, United States Minor Outlying Islands, Uruguay, US Minor Islands, USA, Uzbekistan, Vatican City, Venezuela, Vietnam, Virgin Islands, Wales, Yemen, Zambia, Zimbabwe

Amvrakikos Gulf, Andaman Sea, Arabian Sea, Aral Sea, Arctic Ocean, Atlantic Ocean, Baltic Sea, Barents Sea, Bay of Bengal, Bay of Biscay, Beaufort Sea, Bering Sea, Black Sea, Bohai Sea, Cantabrian Sea, Celtic Sea, Chukchi Sea, Coral Sea, Dead Sea, English Channel, German Bight, Great Barrier Reef, Greenland Sea, Gulf of Aden, Gulf of Fonseca, Gulf of Maine, Gulf of Mexico, Gulf of Saint Lawrence, Halmahera Sea, Iberian Sea, Indian Ocean, Java Sea, Korinthiakos Gulf, Labrador Sea, Levantine Sea, Lingayan Gulf, Mediterranean Sea, Moro Gulf, Okhotsk Sea, Pacific Ocean, Pagassitikos Gulf, Salish Sea, Saronikos Gulf, Scotia Sea, Sea of Azov, Sea of Marmara, Siberian Sea, South China Sea, Southern Ocean, Thermaikos Gulf, Yellow Sea

The Fiery Nudibranch, scientifically known as Okenia amoenula, is a fascinating species of sea slug that captivates with its striking appearance and unique feeding habits. It is a member of the Nudibranchia order, renowned for their vibrant colors and intricate patterns.

Description & Characteristics

The Okenia amoenula is a relatively small nudibranch, typically reaching a maximum size of 2.5 centimeters in length. Its body is characterized by a fiery orange to red hue, often adorned with white or yellow spots. These spots can vary in size and distribution, creating a visually appealing mosaic pattern on its dorsal surface. The Fiery Nudibranch also possesses a pair of prominent rhinophores, sensory organs located on the head, which are used to detect food and navigate its environment.

Habitat and Occurrence

The Fiery Nudibranch is a common sight in intertidal and subtidal zones, thriving in the rich and diverse environments of these marine ecosystems. It is particularly prevalent in the neritic zone, which encompasses the shallow waters of the continental shelf, extending from the lower limit of the intertidal zone to the shelf edge, typically around 200 meters deep. This zone provides a suitable habitat for Okenia amoenula, offering an abundance of its preferred food source and optimal conditions for its survival.

Taxonomy

The Fiery Nudibranch, Okenia amoenula, belongs to the Class Gastropoda, the largest and most diverse class of mollusks. Within this class, it is further classified as a member of the Order Nudibranchia, an order known for its fascinating array of colorful and intricately patterned sea slugs. Finally, Okenia amoenula is part of the Family Goniodorididae, a family of nudibranchs that share similar morphological characteristics, such as their typically elongated body shape and the presence of rhinophores.

Distribution and Occurrence

The Fiery Nudibranch is distributed across various marine ecosystems, including the intertidal, subtidal, and infralittoral zones. Its presence is particularly notable in the neritic zone, which encompasses the shallow waters of the continental shelf, extending from the lower limit of the intertidal zone to the shelf edge, typically around 200 meters deep. This wide distribution reflects the adaptability of Okenia amoenula to a range of marine habitats, highlighting its role as a significant inhabitant of these diverse ecosystems.

Feeding

The Fiery Nudibranch is a specialist feeder, primarily relying on Bryozoans, also known as sea mats, as its food source. Bryozoans are colonial animals that form delicate, intricate structures, offering a plentiful and readily accessible food supply for Okenia amoenula. This specialized feeding behavior underscores the unique ecological niche occupied by the Fiery Nudibranch, contributing to the overall balance of these marine environments.

Associated Species

Image References

Leave a Comment