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Libinia Dubia
''Libinia dubia'', the longnose spider crab, is a species of crab in the family Epialtidae. It is found in shallow waters on the eastern coast of North America. Description The carapace of the longnose spider crab is nearly circular in outline. The shell grows to an average diameter of with the males being larger than the females. There are about six spiny protuberances on each edge of the shell and another six down the midline. The upper surface is covered with short setae (bristles) which are hooked and resemble velcro. To these the crab sticks pieces of seaweed and other organisms as camouflage. There are two small stalked eyes and between these the carapace extends forward in a forked rostrum. There are five pairs of long, thin, jointed walking legs. The front pair end in rather small pincers and the terminal joint of the others legs is a curved claw. The longnose spider crab may be confused with the portly spider crab, ''Libinia emarginata'', but that species usually has nin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Milne-Edwards
Henri Milne-Edwards (23 October 1800 – 29 July 1885) was an eminent French zoologist. Biography Henri Milne-Edwards was the 27th child of William Edwards, an English planter and colonel of the militia in Jamaica and Elisabeth Vaux, a Frenchwoman. Henri was born in Bruges, in present-day Belgium, where his parents had retired; Bruges was then a part of the newborn French Republic. His father had been jailed for several years for helping some Englishmen in their escape to their country. Henri spent most of his life in France. He was brought up in Paris by his older brother Guillaume Frederic Edwards (1777–1842), a distinguished physiologist and ethnologist. His father was released after the fall of Napoleon. The whole family then moved to Paris. At first he turned his attention to medicine, in which he graduated as an MD at Paris in 1823. His passion for natural history soon prevailed, and he gave himself up to the study of the lower forms of animal life. He became a stude ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seagrass Meadow
A seagrass meadow or seagrass bed is an underwater ecosystem formed by seagrasses. Seagrasses are marine (saltwater) plants found in shallow coastal waters and in the brackish waters of estuaries. Seagrasses are flowering plants with stems and long green, grass-like leaves. They produce seeds and pollen and have roots and rhizomes which anchor them in seafloor sand. Seagrasses form dense underwater meadows which are among the most productive ecosystems in the world. They provide habitats and food for a diversity of marine life comparable to that of coral reefs. This includes invertebrates like shrimp and crabs, cod and flatfish, marine mammals and birds. They provide refuges for endangered species such as seahorses, turtles, and dugongs. They function as nursery habitats for shrimps, scallops and many commercial fish species. Seagrass meadows provide coastal storm protection by the way their leaves absorb energy from waves as they hit the coast. They keep coastal waters healthy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loggerhead Turtle
The loggerhead sea turtle (''Caretta caretta'') is a species of oceanic turtle distributed throughout the world. It is a marine reptile, belonging to the family Cheloniidae. The average loggerhead measures around in carapace length when fully grown. The adult loggerhead sea turtle weighs approximately , with the largest specimens weighing in at more than . The skin ranges from yellow to brown in color, and the shell is typically reddish brown. No external differences in sex are seen until the turtle becomes an adult, the most obvious difference being the adult males have thicker tails and shorter plastrons (lower shells) than the females. The loggerhead sea turtle is found in the Atlantic, Pacific, and Indian Oceans, as well as the Mediterranean Sea. It spends most of its life in saltwater and estuarine habitats, with females briefly coming ashore to lay eggs. The loggerhead sea turtle has a low reproductive rate; females lay an average of four egg clutches and then become ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymeniacidon Heliophila
''Hymeniacidon'' is a genus of sea sponges in the class Demospongiae. Some members of the genus are known to be mobile, achieving speeds of between 1 and 4 mm per day.Ruppert, E.E., Fox, R.S. and Barnes, R.D. 2004. ''Invertebrate Zoology'' Species The following species are recognised in the genus ''Hymeniacidon'': *'' Hymeniacidon actites'' (Ristau, 1978) *'' Hymeniacidon addreissiformis'' Dickinson, 1945 *'' Hymeniacidon agminata'' Ridley, 1884 *'' Hymeniacidon assimilis'' Levinsen, 1887 *'' Hymeniacidon atlantica'' Burton, 1948 *'' Hymeniacidon burtoni'' Van Soest & Hooper, 2020 *'' Hymeniacidon caerula'' Pulitzer-Finali, 1986 *'' Hymeniacidon calcifera'' Row, 1911 *'' Hymeniacidon calva'' (Ridley, 1881) *'' Hymeniacidon centrotyla'' Hentschel, 1914 *'' Hymeniacidon chloris'' de Laubenfels, 1950 *'' Hymeniacidon conica'' (Kirk, 1909) *'' Hymeniacidon corticata'' (Thiele, 1905) *'' Hymeniacidon digitata'' (Hansen, 1885) *'' Hymeniacidon dubia'' Burton, 1932 *'' Hymeniacido ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictyota Menstrualis
''Dictyota'' is a genus of brown seaweed in the family Dictyotaceae. Species are predominantly found in tropical and subtropical seas, and are known to contain numerous chemicals (diterpenes) which have potential medicinal value. As at the end of 2017, some 237 different diterpenes had been identified from across the genus. Taxonomy and Nomenclature The genus ''Dictyota'' was first described by Jean Vincent Lamouroux in 1809. The name ''Dictyota'' is derived from the Greek word “Διχτυον” meaning “net” or “network”, referring to the inner cellular structure of specimens when viewed under a microscope, which features netted cortical and medullary cells. ''Dictyota'' belongs to the order Dictyotales and the SSDO-clade, which also includes the orders Sphacelariales, Syringodermatales, and Onslowiales. The family Dictyotaceae is divided into two tribes: Dictyoteae and Zonarieae. The former have a single lens-shaped apical cell from which the thallus grows, while ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oyster Toadfish
The oyster toadfish, ''Opsanus tau'', also known as the oyster toad, ugly toad, oyster cracker, oyster catcher, and bar dog, is a Northeast Atlantic species of fish of the family Batrachoididae. The maximum length of this toadfish is , but they infrequently surpass . The world record size for this species is 19.2 inches which is 48.76 cm. They are generally yellowish with a pattern of brown oblique bars. The species can live in poor conditions and needs little food to live. It is an omnivore. Common prey include crustaceans, mollusks, amphipods, squid, and other smaller fish. Oyster toadfish rely upon camouflage to catch their food; they lie motionless waiting for prey to pass close by, then attack by surprise. They can be found near the shore from Maine to Florida. The fish has a distinctive "foghorn" sound used by males to attract females in the mating season, which is April–October. The sound-producing (sonic) muscles attached to its swimbladders are the fastest known vert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gag Grouper
''Mycteroperca microlepis'', the gag, gag grouper, velvet rockfish or charcoal belly, is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. It comes from warmer parts of the West Atlantic, including the Caribbean and Gulf of Mexico. It is a drab, mottled-gray fish lacking the distinguishing features of most other groupers. Its pattern of markings resemble the box-shaped spots of the black grouper ('' Mycteroperca bonaci''). It lacks the streamer-points on the tail fin that scamp ('' M. phenax'') and yellowmouth grouper ('' M. interstitialis'') have, and lacks yellow coloration around the mouth. Description ''Mycteroperca microlepis'' has an oblong, robust body which is laterally compressed. The depth of the body is normally less than the length of the head and it is usually roughly equal in depth at the origin of the dorsal fin and at the anal fin origin. The s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagodon Rhomboides
''Lagodon'' is a genus of saltwater fish in the family Sparidae, the breams and porgies. It is monotypic, being represented by the single species ''Lagodon rhomboides'', commonly known as pinfish.Masterson, J''Lagodon rhomboides''.Smithsonian Marine Station at Fort Pierce. National Museum of Natural History, Smithsonian Institution. 2008. Other common names include pin perch, sand perch, choffer, and butterfish.90% of the diet for pinfish greater than 100mm. Predators The pinfish is prey for alligator gar, longnose gar, ladyfish, spotted sea trout, red drum, southern flounder, pelicans, grouper, cobia, snook and bottlenose dolphins. Reproduction Sexual maturity is reached at about one year, when the fish is 80 to 100 mm in length. Spawning season is in the fall and winter. Eggs are broadcast in the water by the female, then fertilized by the male. The number of eggs varies from 7,000 to 90,000. They hatch after about 48 hours. Larvae are not protected by adults. The larv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalopa
Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow. The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what larvae will grow into what adults. This is especially true of crustaceans which live as benthic adults (on the sea bed), more-so than where the larvae are planktonic, and thereby easily caught. Many crustacean larvae were not immediately recognised as larvae when they were discovered, and were described as new genera and species. The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as ''zoea'' and ''nauplius''. Other terms described forms which are only found in particular groups, such as the ''glaucothoe'' of hermit crabs, or the ''phyllosoma'' of slippe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoea
Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow. The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what larvae will grow into what adults. This is especially true of crustaceans which live as benthic adults (on the sea bed), more-so than where the larvae are planktonic, and thereby easily caught. Many crustacean larvae were not immediately recognised as larvae when they were discovered, and were described as new genera and species. The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as ''zoea'' and ''nauplius''. Other terms described forms which are only found in particular groups, such as the ''glaucothoe'' of hermit crabs, or the ''phyllosoma'' of slippe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zooplankton
Zooplankton are the animal component of the planktonic community ("zoo" comes from the Greek word for ''animal''). Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by currents in the ocean, or by currents in seas, lakes or rivers. Zooplankton can be contrasted with phytoplankton, which are the plant component of the plankton community ("phyto" comes from the Greek word for ''plant''). Zooplankton are heterotrophic (other-feeding), whereas phytoplankton are autotrophic (self-feeding). This means zooplankton cannot manufacture their own food but must eat other plants or animals instead — in particular they eat phytoplankton. Zooplankton are generally larger than phytoplankton, most are microscopic, but some (such as jellyfish) are macroscopic and can be seen with the naked eye. Many protozoans (single-celled protists that prey on other microscopic life) are zooplankton, including zooflagellates, fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg (biology)
An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches. Most arthropods such as insects, vertebrates (excluding live-bearing mammals), and mollusks lay eggs, although some, such as scorpions, do not. Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective shell, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable temperature range while the embryo grows. When the embryo is adequately developed it hatches, i.e., breaks out of the egg's shell. Some embryos have a temporary egg tooth they use to crack, pip, or break the eggshell or covering. The largest recorded egg is from a whale shark and was in size. Whale shark eggs typically hatch within the mother. At and up to , the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
