Although corals can catch small fish and plankton, using stinging cells on their tentacles, most corals obtain the majority of their energy and nutrients from photosynthetic unicellular algae called zooxanthellae that live within the coral's tissue.

Although they are geologically younger than the tabulate and rugose corals, their aragonitic skeleton is less readily preserved, and their fossil record is less complete.

Although corals exist both in temperate and tropical waters, shallow-water reefs form only in a zone extending from 30 ° N to 30 ° S of the equator.

Although deep water corals can form reefs, very little is known about them.

Although corals are major contributors to the framework and bulk material comprising a coral reef, the organisms most responsible for reef growth against the constant assault from ocean waves are calcareous algae, especially, although not entirely, species of coralline algae.

Although corals feed nocturnally on plankton, sunlight

Although there is no direct proof, it is inferred that these Palaeozoic corals possessed stinging cells to capture prey.

Although the solution is thought to be effective when used with stony corals, systems containing xenia and soft corals are assumed to be particularly benefited by the use of Lugol's solution.

Although the biomachinery facilitating biomineralization is complex – involving signalling transmitters, inhibitors, and transcription factors – many elements of this ' toolkit ' are shared between phyla as diverse as corals, molluscs, and vertebrates.

“ Although deeper-water corals form reefs in the dark of ocean depths, Pulley Ridge is the deepest photosynthetic coral reef that we know of today ,” said Robert Halley, USGS marine geologist .” Other reefs lie about 46 meters below sea level.

Although this kind of wholesale objection came at first from some men who were not technically Puritans, still, once the Puritans gained power, they climaxed the affair by passing the infamous ordinance of 1642 which decreed that all `` public stage-plays shall cease and be forborne ''.

Although Mr. Brown was not himself its inventor ( it was a French idea ), it is typical that his intuition first conceived the importance of mass producing this basic tool for general use.

Although we are still far from a complete understanding of these problems, as a first approximation, it is suggested that alterations in the hypothalamic balance with consequent changes in the hypothalamic-cortical discharges account for major changes in behavior seen in various moods and states of emotions in man and beast under physiological circumstances, in experimental and clinical neurosis, and as the result of psychopharmacological agents.

Although the government was probably prepared for elections by mid-1958, the first decision was no doubt made more difficult as party strife multiplied.

Although the pause in the advance of general business activity this year has thus far been quite modest, it is hard to escape the conclusion that the softening process will continue into the first quarter of 1961 and possibly somewhat longer.

Although it is not possible to sunder old and new in this era, I shall consider in the present chapter primarily the first decades of the eighth century and shall interpret them as an apogee of the first stage of Greek civilization.

Although the first polyether foams on the market had to be produced by the two-step prepolymer method, today, thanks to new catalysts, they can be produced by a one-shot technique.

Although slab stock appeared first, it soon became apparent that for the production of cushions with irregular shapes, crowned contours, or rounded edges, the cutting of slab stock is a wasteful and uneconomical process.

Although it was at the Battle of The Little Horn, about which more words have been written than any other battle in American history, that the 7th Cavalry first made its mark in history, the regiment was ten years old by then.

Although this was the first time that Helva had seen unshelled people, she took this experience calmly.

Although americium was likely produced in previous nuclear experiments, it was first intentionally synthesized, isolated and identified in late autumn 1944, at the University of California, Berkeley by Glenn T. Seaborg, Leon O. Morgan, Ralph A. James, and Albert Ghiorso.

Although it had at first been somewhat established in many colonies, in 1861 it was ruled that, except where specifically established, the Church of England had just the same legal position as any other church.

Although popular from her first appearance in 1930, Jane Marple had to wait thirty-two years for her first big-screen appearance.

Although an explanation for the phenomenon was not provided until 1919, duralumin was one of the first " age hardening " alloys to be used, and was soon followed by many others.

Although Andean Amerindian peoples crafted ceremonial jewelry of gold and other metals the mineralizations of the Andes were first mined in large scale after the Spanish arrival.

Although Amasis thus appears first as champion of the disparaged native, he had the good sense to cultivate the friendship of the Greek world, and brought Egypt into closer touch with it than ever before.

Although English has no official status in the Constitution, Australian English is Australia's de facto official language and is the first language of the majority of the population.

Although he is sometimes regarded as among the first and most influential architects of Nordic modernism, a closer examination of the historical facts reveals that Aalto ( while a pioneer in Finland ) closely followed and had personal contacts with other pioneers in Sweden, in particular Gunnar Asplund and Sven Markelius.

Although they failed to make the playoffs in 2009, the streak ended when the team rallied to win their final three regular season games to record back-to-back winning seasons for the first time in franchise history.

Although Dürer made no innovations in these areas, he is notable as the first Northern European to treat matters of visual representation in a scientific way, and with understanding of Euclidean principles.

Although anthems were written in the Elizabethan period by Tallis ( 1505 – 1585 ), Byrd ( 1539 – 1623 ), and others, they are not mentioned in the Book of Common Prayer until 1662, when the famous rubric " In quires and places where they sing here followeth the Anthem " first appears.

Although myths and speculation about a Terra Australis (" Southern Land ") date back to antiquity, the first confirmed sighting of the continent of Antarctica is commonly accepted to have occurred in 1820 by the Russian expedition of Fabian Gottlieb von Bellingshausen and Mikhail Lazarev on Vostok and Mirny.

Although those of many marine species function first as males and then as females, their colonies always contain a combination of zooids that are in their male and female stages.

Although she appeared more subdued and defeated, Jones knew she was growing more dangerous.

Although gold has an atomic number of 79, immediately after Rutherford's paper appeared in 1911 Antonius Van den Broek made the intuitive suggestion that atomic number is nuclear charge.

Although none of the characters from The Beverly Hillbillies ever appeared on Green Acres, an episode of Green Acres was named after The Beverly Hillbillies.

Although at first the disagreement appeared to be minor and inspired by personal conflicts, for example, Lenin's insistence on dropping less active editorial board members from Iskra or Martov's support for the Organizing Committee of the Congress which Lenin opposed, the differences quickly grew and the split became irreparable.

Although the phrase " perfect game " appeared in record books as early as 1922, and was a common expression years before that, Major League Baseball did not formalize the definition of a " perfect game " until 1991, long after Young's death.

Although recognized previously by others, the mathematical expression for the Coriolis force appeared in an 1835 paper by French scientist Gaspard-Gustave Coriolis, in connection with the theory of water wheels, Early in the 20th century, the term Coriolis force began to be used in connection with meteorology.

Although many of his works appeared in print while a teenager, it was the publication of " Light breaks where no sun shines ", published in 1934, that caught the attention of the literary world.

Although a few limited-production battery-powered electric vehicles have appeared, they have not proved to be competitive owing to costs and operating characteristics.

Although bananas are less subject to the vagaries of international markets than coffee, natural disasters such as Hurricane Fifi in 1974, drought, and disease have appeared with a regular, albeit random, frequency to take their economic toll through severely diminished harvests.

Although new publication dates were repeatedly announced, the book never appeared.

Although he appeared in just 87 games, he scored 89 runs, had 116 hits, nine home runs, and 61 RBI.

* Although Richard appeared as Maigret for many decades, Maigret creator Georges Simenon disliked him since he failed to take his hat off when entering a room.

Although the oil discoveries of the 1960s have brought it immense petroleum wealth, at the time of its independence it was an extremely poor desert state whose only important physical asset appeared to be its strategic location at the midpoint of Africa's northern rim.

Although the result initially appeared uncertain, the Romans were victorious.

Although numerous political references to the " Wizard " appeared early in the 20th century, it was in a scholarly article by Henry Littlefield, an upstate New York high school history teacher, published in 1964 that there appeared the first full-fledged interpretation of the novel as an extended political allegory of the politics and characters of the 1890s.

" Although Lex only appeared a few times after the first season, he is mentioned a great deal throughout the rest of the seasons which reveals him as still a very important character.

) Although the fictitious faculty first appeared in the Bruces sketch in the TV show Monty Python's Flying Circus, the song itself was not included, making its debut on the album Matching Tie and Handkerchief as a coda for the sketch.

Although a new constitution appeared to end the war-time political system, it did not completely terminate the transitional military rule.

Although the details remain sketchy, Kerensky appeared to become frightened by the possibility of a coup and the order was countermanded ( by comparison, historian Richard Pipes has argued that the whole episode was engineered by Kerensky himself ).

Although he wore his distrust for foreigners like a badge of loyalty to the nation, López was not as cautious as he appeared.

Although Falk appeared in numerous other television roles in the 1960s and 1970s, he is best known as the star of the TV series Columbo, " everyone's favorite rumpled television detective ", writes historian David Fantle.

* Although unnamed, Polyphemus appeared in the TV mini-series The Odyssey played by Reid Asato.

" Although Eulalius appeared to be destined to be confirmed to the post, by boldly entering Rome on 18 March — Easter Sunday that year fell on 30 March — and disobeying Imperial orders, he lost the support of the authorities.