Called "sea locusts" by ancient Assyrians, "prawn killers" in Australia and now sometimes referred to as "thumb splitters" – because of the animal's ability to inflict painful gashes if handled incautiously – mantis shrimp sport powerful claws that they use to attack and kill prey by spearing, stunning, or dismemberment. Although it only happens rarely, some larger species of mantis shrimp are capable of breaking through aquarium glass with a single strike from this weapon. Ecology These aggressive and typically solitary sea creatures spend most of their time hiding in rock formations or burrowing intricate passageways in the sea bed. They either wait for prey to chance upon them or, unlike most crustaceans, at times they hunt, chase, and kill prey. Classification and the claw Mantis shrimp from the front The snap can also produce sonoluminescence from the collapsing bubble. Eyes Each compound eye is made up of up to ten thousand ommatidia of the apposition type.
Related: Marine Biology
Marine biologyOnly 29 percent of the world surface is land. The rest is ocean, home to the marine lifeforms. The oceans average nearly four kilometres in depth and are fringed with coastlines that run for 360,000 kilometres. A large proportion of all life on Earth exists in the ocean. Exactly how large the proportion is unknown, since many ocean species are still to be discovered. Marine life is a vast resource, providing food, medicine, and raw materials, in addition to helping to support recreation and tourism all over the world. Many species are economically important to humans, including food fish (both finfish and shellfish). History The observations made in the first studies of marine biology fueled the age of discovery and exploration that followed. The creation of marine labs was important because marine scientists had places to conduct research and process their specimens from expeditions. Subfields Related fields Animals Birds Fish Invertebrates
IchthyologyIchthyology (from Greek: ἰχθύς, ikhthus, "fish"; and λόγος, logos, "study") is the branch of zoology devoted to the study of fish. This includes skeletal fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). While a large number of species have been discovered and described, approximately 250 new species are officially described by science each year. According to FishBase, 32,200 species of fish had been described by March 2012. There are more fish species than the combined total of all other vertebrates: mammals, amphibians, reptiles and birds. History Fish represent approximately 8% of all figurative depictions on Mimbres pottery. The study of fish dates from the Upper Paleolithic Revolution (with the advent of 'high culture'). 1500 BC–40 AD 335 BC–80 AD European Renaissance 16th–17th century Frontipiece from Ichthyologia, sive Opera Omnia de Piscibus by Peter Artedi Modern era Modern Publications
15 Deadliest Beach CreaturesKeep away from any of these 15 deadly creatures when you next visit the beach. 1. Portuguese Man-of-War Jellyfish Not a true jellyfish, the Portuguese Man-of-War is a siphonophore – a colony of organisms living together. Source 2. The Marble Cone snail shell looks beautiful but the sea creature inside is deadlier than any other possible beach inhabitant listed here. Source 3. Ocean-going trawlers are where most sea snake bites occur since the snake can be hauled in along with desirable catch. Source 4. The marine snail which inhabits cone shells are found in reefs all around the globe. Source 5. The Dornorn, commonly called the “stonefish” is among the most venomous beach creatures on the planet. Source 6. Box jellyfish, known commonly as sea wasp, is probably the most dangerous beach creature listed here. Source 7. A Blue-Ringed Octopus, athis golf ball sized sea creature has enough venom to kill as many as 26 people within minutes. Source 8. 9. Source 10. Source 11. Source 12. Source 13. Source
SiphonophoresCensus of Marine LifeIt is the world's largest census, but hasn't been completed yet and probably never will be. The Census of Marine Life, an international project involving hundreds of researchers, has recorded some 185,000 different species so far, from tiny single-cell creatures to the blue whale. The majority of life on our planet swims or crawls in the oceans. The "Catalogue of the Seas" produced by the census won't be published until October. But much of the research can already be accessed in the scientific journal PloS ONE, published by the Public Library of Science, a non-profit organization of scientists. "This is the first time that all the information we have on the oceans can be found in a single publicly accessible source," Patricia Miloslavich of Universidad Simón Bolívar in Venezuela, one of the main authors of the census and the regional coordinator for the Caribbean, said in a statement. What Lives in the Sea? But the researchers have come up with some illuminating findings: