Talk:Fish
From Academic Kids
Actually, I've double-checked since my "correction" of "imperilled", and apparently either way is acceptable, one 'l' or two (single 'l' is listed first, generally meaning it's preferred, but no biggy). So I'm certainly not going to bother to change it back, but just so you know, my speling wasn't wrong either. -- John Owens 07:15 16 May 2003 (UTC)
If you look at Tuna it states that they are warm blooded. Is it true that all fish are Poikilothermic? Huddy 22:16, 14 Jan 2004 (UTC)huddy
- No, it seems there are just a small number of large fast fish of the open ocean with elevated internal temps. Stan 15:29, 16 Jun 2004 (UTC)
numbers
"Fishes (over 27,315 species) are a paraphyletic group and are divided into the bony fishes (class Osteichthyes, 22,000 species); cartilaginous fishes (class Chondrichthyes, 800 species); and various groups of jawless fishes (class Agnatha, 75 species)"
- Curious to know, what are the other 4,440 not accounted for there? - MPF 14:24, 16 Jun 2004 (UTC)
- The Osteichthyes number is out of date. Stan 15:29, 16 Jun 2004 (UTC)
I quoted the thing about Great whites being the only "Proper" warm blooded fish to a friend and he challenged me on it, just because it didn't sound right to him. I've done some research on the net and this seems to confirm that Great White have no greater claim to warm bloodedness than the aformantioned tuna, or several other related large shark species, like Mako's and Porbeagles. However, I'm not Icthyologist, so I'm kinda timid about changing it. Are there any Icthyologists here who might know for sure? (reincarnationfish)
Well, I'm new to contributing to Wikipedia, but I am an ichthyologist and I have researched white sharks, so I guess I'm qualified to weigh in here. The previous person is fundamentally correct -- there are several endothermic fishes. White sharks are pretty good at it, but the real champs are probably porbeagle sharks and some of the tunas. It is still open for debate whether these spp. constitute true endotherms or highly specialized poikilotherms. I fall on the side of endothermy, and I think the literature supports that adequately. I hope no one minds -- I am going to make some changes to the web page text. John Kelly (19 Apr 2005)
