s***e
发帖数: 5242 | 1 可能写不完，以后再补。
海鱼的颜色那么鲜艳丰富，对比之下，淡水鱼要矜持的多。原因就不深究了，今天单单
谈谈三种鱼的颜色：goldfish, betta, guppy.
1. betta
http://www.bettaterritory.nl/BT-AABcolorgenetics.htm
betta的皮肤有四层颜色层，由外往内分别是蓝，红，黑，黄。我家的是种叫Cambodian
的，就是身体没有任何色素，只有肉色。
TBC ... | D**d
发帖数: 1186 | | z*y
发帖数: 1311 | 3 上次去petco，店小二挑逗我养海水缸：Compared with salt water, fresh water is
b/w, but salt water is hd color... 说的时候那语气眼媚神态，真TM欠抽的感觉 :) | d********1
发帖数: 2462 | | s***e
发帖数: 5242 | 5 倒不是，我觉得下面这个回答靠谱：
https://answers.yahoo.com/question/index?qid=20101105080535AAZo4N9
There are super bright fish and super dull colored fish found in both
freshwater and in saltwater areas. Many freshwater fish are exceptionally
bright and amazingly colored (especially when breeding). Look at Jewel
cichilds or ram cichlids for two examples.
Part of the reason that in the trade/hobby there are more bright saltwater
fish, is that most of those fish are reef fish. The corals are bright
because of their photosynthetic zooxanthellae and different absorptions and
reflections of light. The reef fish then must have bright camouflage to
blend in with the corals. There are many dull colored marine fish that never
make it to the aquarium store because they are grey, get large, or just are
hard to catch. Plus who wants to spend $200 on a plain looking fish? (Lots
of costs involved in saltwater - cites, catching the fish, transporting the
fish across the world, storing/holding the fish, etc) Reef fish are in
shallower water and easier to catch. Many stay relatively small as well.
These are the common bright fish you see for sale.
Many freshwater fish come from bland areas and are often duller colors to
blend in with their surroundings.
【在 D**d 的大作中提到】
: 估计跟淡水鱼爱躲在树荫下，海水鱼爱日光浴有关？
| z*y
发帖数: 1311 | 6
and
我感觉这种回答很民科
Generally speaking, it is always easier for dull colors to blend into
environment. In the animal world, the purpose of bright color is usually to
attract not to camouflage.
Anyway, 我也是民科，大家讨论说笑而已。
【在 s***e 的大作中提到】
: 倒不是，我觉得下面这个回答靠谱：
: https://answers.yahoo.com/question/index?qid=20101105080535AAZo4N9
: There are super bright fish and super dull colored fish found in both
: freshwater and in saltwater areas. Many freshwater fish are exceptionally
: bright and amazingly colored (especially when breeding). Look at Jewel
: cichilds or ram cichlids for two examples.
: Part of the reason that in the trade/hobby there are more bright saltwater
: fish, is that most of those fish are reef fish. The corals are bright
: because of their photosynthetic zooxanthellae and different absorptions and
: reflections of light. The reef fish then must have bright camouflage to
| s***e
发帖数: 5242 | 7 我觉得你说得有道理。动物就care两件事：生存与繁殖。
但不同意 it is always easier for dull colors to blend into environment. 那么
变色章鱼就没必要那么辛苦 blending itself into environment了。
下面这个link我还没看完：
https://dtmag.com/thelibrary/reef-fish-colorful-science-behind-beauty/
to
【在 z*y 的大作中提到】
:
: and
: 我感觉这种回答很民科
: Generally speaking, it is always easier for dull colors to blend into
: environment. In the animal world, the purpose of bright color is usually to
: attract not to camouflage.
: Anyway, 我也是民科，大家讨论说笑而已。
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