Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Politics : Sharks in the Septic Tank -- Ignore unavailable to you. Want to Upgrade?

To: The Philosopher who wrote (56599)	9/2/2002 10:52:39 PM
From: epicure	Read Replies (1) \| Respond to of 82486

actually sharks are fish, biologically and otherwise See below: Sharks, skates, rays, and even stranger fish make up the Chondrichthyes, or "cartilaginous fish." First appearing on Earth almost 450 million years ago, cartilaginous fish today include both fearsome predators and harmless mollusc-eaters (harmless, that is, unless you are a mollusc). A number of shark and ray species are fished, commercially or for sport. Members of the Chondrichthyes all lack true bone and have a skeleton made of cartilage (the flexible material you can feel in your nose and ears). Only their teeth, and sometimes their vertebrae, are calcified; this calcified cartilage has a different structure from that of true bone. Thus, preservation of the whole body of a cartilaginous fish only takes place under special conditions. This complete fossil rhinobatoid (guitarfish -- one of the earliest rays), Rhinobatis, shown on display at the Senckenberg Museum in Frankfurt, Germany, is from the Upper Cretaceous of Haqel, Lebanon, a place that has yielded many complete fossil sharks and rays.