Next Chat Event





..

Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Go down

Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Dragon on Wed Apr 11, 2018 1:04 pm

A newly discovered “lachrymal saber” could illuminate relationships between an order of deadly fishes.

I n 2003, Leo Smith was dissecting a velvetfish. Smith, an evolutionary biologist at the University of Kansas, was trying to figure out the relationships between mail-cheeked fishes, an order that includes velvetfishes, as well as waspfishes, stonefishes and the infamous lionfish. As he worked his way to the velvetfish’s upper jaw, though, he realized something strange—he was having trouble removing the lachrymal bone.

“On a normal fish, there’s a little bit of connective tissue and you can work a scalpel blade between the upper jaw and this bone,” recalls Smith, whose work centers on the evolution of fish venom and bioluminescence. “I was having just a horrible time trying to separate it. When I finally got it separated, I noticed there was this thing that’s all lumpy and bumpy … it was then that it hit me that it had to be some sort of locking mechanism.”


To be fair, most velvet fish already resemble thorny, blobby mutants, so an extra skewer isn’t really that unusual. But given that Smith has spent years studying mail-cheeked fishes (Scorpaeniformes)—an order that gets its common name from the bone plates found on each cheek—you’d think he would have noticed a massive, locking eye spike before. He hadn’t. He and his colleagues would dub this strange new discovery the “lachrymal saber.”

(FYI: Lachrymal comes from the Latin word for “tear.” While fish can’t cry, it’s still the technical name for the bone forming the eye socket.)

Smith and his co-authors at the American Society of Ichthyologists and Herpetologists describe this unlikely eye spike for the first time in the journal Copeia—and even report on one that glows fluorescent green, a little eye lightsaber. The authors can’t yet say exactly what the appendage is for. But they do claim that it has the potential to profoundly rearrange the Scorpaeniformes evolutionary tree, changing what we know about these highly venomous fish.

Source

 
avatar
Dragon
Senior Administrator
Senior Administrator

Posts : 3187
Points : 14493
Times User Thanked: : 154
Join date : 2018-01-18

Back to top Go down

Re: Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Dragon on Wed Apr 11, 2018 1:46 pm


By BS Thurner Hof - Own work, Public Domain

Shown is the head of Broadbarred firefish (Lionfish), family "Scopaenidae"

Source / Image Courtesy


 
avatar
Dragon
Senior Administrator
Senior Administrator

Posts : 3187
Points : 14493
Times User Thanked: : 154
Join date : 2018-01-18

Back to top Go down

Re: Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Dragon on Wed Apr 11, 2018 1:47 pm



This is rare footage of a velvet fish going for a stroll at Rye Pier, Australia.

 
avatar
Dragon
Senior Administrator
Senior Administrator

Posts : 3187
Points : 14493
Times User Thanked: : 154
Join date : 2018-01-18

Back to top Go down

Re: Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Dragon on Wed Apr 11, 2018 1:49 pm



While diving with Coast Watch Alliance in the last Gulf Coast Lionfish Coalition derby in Pensacola, FL we came across a reef that had a high density of lionfish present.

 
avatar
Dragon
Senior Administrator
Senior Administrator

Posts : 3187
Points : 14493
Times User Thanked: : 154
Join date : 2018-01-18

Back to top Go down

Re: Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Dragon on Wed Apr 11, 2018 1:50 pm



The venomous and invasive lionfish, native to the Indo-Pacific, is a serious threat to endemic species in the Caribbean and up the Atlantic coast.

 
avatar
Dragon
Senior Administrator
Senior Administrator

Posts : 3187
Points : 14493
Times User Thanked: : 154
Join date : 2018-01-18

Back to top Go down

Re: Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Ruby on Fri Apr 13, 2018 5:35 pm

Those are so cool it would be fun to go diving in australia
avatar
Ruby
Full Member
Full  Member

Female Zodiac : Taurus Posts : 29
Points : 299
Times User Thanked: : 1
Join date : 2018-03-29

Back to top Go down

Re: Why Did a Venomous Fish Evolve a Glowing Eye Spike?

Post by Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum