Are sharks found in the California delta? If so what kind? What part?
958228
Well it's fresh water and there are no freshwater sharks found in North America ( none found yet as far as I know)  you are at the very extreme northern range for the Bull Shark according to this\nhttp://en.wikipedia.org/wiki/Image:Bull_shark_distmap.png\n\nwhich is the only sea shark that I know of which often swims up rivers.
2710
There are more than 360 described species of sharks.\nThere are eight orders of sharks:\n\n    * Hexanchiformes\n    * Squaliformes\n    * Pristiophoriformes\n    * Squatiniformes\n    * Heterodontiformes\n    * Orectolobiformes\n    * Carcharhiniformes\n    * Lamniformes
1170112
I presume you mean what fossil dinosaurs have been found in the state? In which case it's Hadrosaur, ankylosaur & plesiosaur. On the other hand it could be a 'living fossil' thats seven foot long, 250 million years old, and currently lurking in the depths of Oregon's Rogue River? It's the green sturgeon, the craggy, shark-like fish that has quietly eked out a living since the time of the dinosaurs.
467271
goblin sharks are very very rare and little is know about them.The Goblin shark is a bottom-dweller found in depths of about 3,940 feet (1,200 m) in the western Pacific, the western Indian Ocean and the western and eastern Atlantic. Not easy to find even at 14ft long.\nIt has 2 rows of teeth so you cant really count one by one. as soon as it loses one tooth another one is on the way.
596488
I dive with them all the time without a cage. I live in Miami and we go diving with sharks every weekend. The only Shark I would be concerned about would be a great white. We see Mako's, bull, hammerhead, etc. all the time. They will not hurt you unless you have a fish or look like an easy meal.
631008
Sharks are boneless fish, so very primitive evolutionarily-they harken back a few hundred million years, without very much change- I seriously doubt, both because they are so primitive and havent changed in so long, that they have any remaining vestigial structures.  Generally vestigial structures come from an animal that has evolved from a quite different precursor-sharks are very close to the very first fish that evolved, thus they probably havent had to shed any organs or bones that arent useful.\nRibs? How is that vestigial?  They use their ribs for structural support, just like all fish...
927972
For starters, the person who previously answered is quite wrong, notably in his statements #2, # 3 and #4. Jewelry has never been reported as a contributing factor in any attack, so you can pretty well dismiss # 1 as well.\n He's even incorrect about shark numbers in the Bahamas. There are actually many species, but most are harmless or have no interest in making a diver a snack. If you do encounter a shark on your dive, just be calm, keep your eye on it and move away slowly or keep your distance. You won't be on the menu unless you provoke it and even then, it's likely to be a simple charge and not an attack.\n There are a few species you may come across, notably the Nurse shark, that although large and fearsome looking, are actually fairly docile and allow a close encounter. I've swum with a number of 10 footers on night dives and a few I've found sleeping under ledges. I still have all my bits and pieces. Hell, I've even given one a rub.\n You'll be diving there with a DM. He may even take you to where there are sharks hanging about. Listen to his briefing pre dive and he'll explain what he expects of you regarding shark encounters. He knows these fish and may even know each individual shark and their specific behavior on past dives.\n Relax, have fun and take some pics.
680735
Oh! Deltas! Estauries are sunken river mouths. Good examples: China's Pearl River Delta, Argentina's La Plata, Maryland's Chesapeake Bay.\n\nBird's foot or digitate, that's where the river branches out at the mouth. Nile River Delta, the classic. Niger River Delta, and Mississippi Delta. \n\nArcuate. Hmmmm...I'm guessing it's roundish, but...I'm going to have to look it up! Yes, it's arc shaped, and the Ganges Delta is an example. Darn it! The Nile is, too! Oooh! Nice photo illustrating the Nile Delta article! Oh the Niger delta is, too! Guess that leaves the Mississippi Delta as a bird's foot!
988719
Well, mainly, mangrove. There used to be at least eight distinct species of mangrove in the delta (one of the largest deltas in the world.) But recent natural disasters and deforestation has reduced the number of species to three or four. You can learn more by following the link below.
374767
When the sturgeon are biting.  What's a Sac. Cali anyway?
695107
Sharks (superorder Selachimorpha) are fish with a full cartilaginous skeleton and a streamlined body. They respire with the use of five to seven gill slits.  Sharks belong to the superorder Selachimorpha in the subclass Elasmobranchii in the class Chondrichthyes. The Elasmobranchii also include rays and skates; the Chondrichthyes also include Chimaeras. It is currently thought that the sharks form a polyphyletic group: in particular, some sharks are more closely related to rays than they are to some other sharks.\nDolphins are highly intelligent aquatic mammals that are closely related to whales and porpoises. All Dolphins belong to the Suborder Odontoceti, and Family Delphinidae, or Platanistoidea. There are almost forty species of dolphin in seventeen genera. They vary in size from 1.2 m (4 ft) and 40 kg (88 lb) (Maui’s Dolphin), up to 9.5 m (30 ft) and ten tonnes (the Orca).
689929
These beaches are protected by shark nets\nBondi, Bronte, Clovelly, Coogee, Cronulla, Maroubra, Tamarama, Bungan, Collaroy-Narabeen, Dee Why-Long Reef, Freshwater, Manly, Newport, Palm Beach, Shelly Beach and Warriewood.\n\nIf you are scared of sharks, they are the places to go!
471078
There are sharks in all seas and oceans aaround the world. \n\nThere are many species of sharks found in the Mediterranean, especially in the western and central Med - including Hammerheads and Great Whites. Unfortunately the numbers of these sharks, of all sharks in the med, are in great decline and in many areas the numbers are close to non-existent. The culprit for this is commercial fishing (for blackfinn tuna and swordfish - both as a result of being caught in netsAND having their natural food sources depleted, in some cases to extinction - bluefin tuna became extinct in the Med in the 1940's)and, ironically enough, tourism. Especilly around Croatia in the late 90's there were several 'Jaws Tours'operating. The 'chumming' undertaken to attract sharks obviously attracted sharks into tourist areas which resulted in the culling of many, many sharks so as not to endanger tourism!\n\nSo, yes, there are sharks in the Med but I wouldn't be put of swimming in the Med as shark attacks here are almost non existent. Between 1508 and 2004 therewere a total of 38 shark attacks in European/Mediterranean waters. 18 of which were fatal with the last reported fatal shark attack being in 1984.  \n\nBut please get your friend to put the possibility of shark attack into persective. WORLDWIDE shark attacks between 1508 and 2004 totalled 1,986 of which 486 were fatal - in almost 500 YEARS! More people have been killed by deers running into their cars than by sharks!
1117055
Whale shark?  Is that near the Ningaloo Reef?
298372
Apparently a kind of sea bass.\n\nSee photo below.  It might also be called a "black sea bass", found near Catalina island off California.\n\nEr ... it's also a kind of drum (Catalina brand bass drum) but  since this is in the Biology category, I think you want the fish  :)
813666
There is 1 baby female living at Sea World San Diego, but I don't know if she's visible to the public. This little 7 footer currently has the record for surviving in captivity - 54 days as of 11/7/2006.\n\nGreat Whites don't survive after they're captured, and scientists are trying to figure out why. The previous record was 16 days back in August 1981.\n\nFor some reason, after about 10 days sharks stop eating, start swimming erratically, bumping off of walls, and eventually sink to the bottom of the holding tank, where they drown. If a shark doesn't keep water over its gills, it doesn't get any oxygen and dies.\n\nLots of things have proven to be involved - great whites can detect as little as 0.01 volts of electricity in the water. This transient voltage interferes with their guidance or feeding instincts and they batter themselves against the cage trying to get to the source of the signal. \n\nThe facility in San Diego has no electronics of any kind directly mounted on or near the tank. The tank is also significantly bigger than previous efforts: 1,000,000+ gallons. The researchers also took several days to acclimate the young shark in a fenced off area of the ocean, gradually reducing the size until it was the same size as its million gallon intended home.\n\nDespite years of research, very little is actually known about Great Whites. How deep they can go? What are their reproductive habits? How often do they give birth? Why are their movement patterns over a lifetime? All of these questions are still mysteries.\n\nGive it a few years. Once we get answers to some of the basic questions, we might be able to keep them in captivity. Hopefully we'll be able to not only learn from them, but protect them so our children and grandchildren can enjoy them, too.\n\nHope that answers your question,\nOdd
854620
no, sharks are NO invertebrates, they got a spine