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2008-08-08 12:00:24

U.S. scientists say the New Zealand mud snail, long a problem in western states, has spread across four U.S. Great Lakes and is altering the lakes' ecology. Pennsylvania State University scientists said the tiny snails out-compete native snails and insects but aren't good fish food replacements for the native species. "These snails have an operculum, a door that closes the shell," said Associate Professor Edward Levri at the university's Altoona, Pa., campus. "They can be out of the water...


Latest Operculum Reference Libraries

45_071d9d58cb59f4fd598929e2395aa8e4
2008-06-16 14:16:00

The Toadstool Groper (Trachypoma macracanthus), is a species of sea bass in the subfamily Anthiinae and of the family Serranidae. It is found in the southwest Pacific Ocean, in eastern Australia, the Kermadec Islands, Norfolk Island, Lord Howe Island, and offshore islands of Northland in New Zealand. It lives in crevices and caves of rocky reef areas during the day, moving out to feed during the hours of darkness. The toadstool groper is a solid-bodied species, with no gap between the two...

39_2142ed1af9a4c1468f2cc845d4e9bac8
2007-06-24 18:17:35

The Balbo sabretooth, Evermannella balbo, is a sabretooth of the family Evermannellidae, found circumglobally in tropical and subtropical seas, at depths of between 328.08 and 3280.84 ft (100 and 1,000 m). Its length is up to 6.69 in (17 cm). The Balbo sabretooth is a small narrow-bodied species with a large mouth filled with an array of long, barbed teeth on both jaws. The upward-directed telescopic eyes are set close together on top of the head. The second dorsal fin is adipose. The...

39_f71e5e2eba880171fbdccacfc39a4e02
2007-03-16 19:11:23

The Bluegill (Lepomis macrochirus) is a species of freshwater fish. It is a member of the sunfish family (family Centrarchidae) of order Perciformes. It is native to a wide area of North America, from Québec to northern Mexico, and has been widely transplanted to stock game fish for anglers. It is commonly fished in Minnesota, but it is the state fish of the U.S. state of Illinois. Of typical sunfish body shape, the Bluegill's most notable feature is the blue or black "ear", actually an...

39_0c1da1b657c8bcdef5a0e30ad13924d5
2007-03-12 19:38:00

The Bight stinkfish, Foetorepus phasis, is a dragonet of the family Callionymidae, found in the eastern Indian and southwest pacific Oceans, at depths of between 524.93 and 656.17 ft (160 and 200 m). Length is up to 5.12 in (13 cm). The bight stinkfish has a large flattened head and round tapering body, and all the fins are very well developed. Bulbous eyes dominate the head, positioned above the small weak mouth with its overhanging upper lip. The gill opening is reduced to a small pore...

39_e1afc116b72c00b0796204ac53825c9b
2007-02-25 20:57:13

The Toadfish are a type of ray-finned fish often found on the sand and mud bottoms of coastal waters worldwide, notable for somewhat broad heads and drab coloration reminiscent of terrestrial toads, as well as for the ability of the males of some species to "sing" using their swim bladders. They are classified as the sole family Batrachoididae of the order Batrachoidiformes, and include about 70 species in 19 genera, among them the common oyster toadfish, Opsanus tau. Their spines may inflict...

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Word of the Day
bellycheer
  • Good cheer; viands.
  • To revel; to feast.
The word 'bellycheer' may come from 'belle cheer', "good cheer".
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