Armed with these adaptations, coleoids began to take advantage of a new niche: the deep sea.
有了这些适应性，珊瑚虫开始利用一个新的利基市场：深海。
Coleoid
原声例句
PBS地球-动物趣闻
PBS地球-动物趣闻
Today, coleoids have colonized every marine ecosystem on the planet, and they play a vital role in ocean food webs.
今天， 胶状体已经在地球上的每一个海洋生态系统中定居，它们在海洋食物网中发挥着至关重要的作用。
PBS地球-动物趣闻
But the coleoids were able to take refuge in the deep sea, and were no longer dependent on their shells.
但是蛲虫能够在深海中避难，不再依赖于它们的贝壳。
中文百科
蛸亚纲 Coleoidea
（重定向自Coleoid）
蛸亚纲（学名Coleoidea）是头足纲下的一类软件动物。它们不像鹦鹉螺亚纲般有硬壳，最多只有用来控制浮沉的内骨。一些物种甚至完全没有骨头，一些则以软骨来支撑。
蛸亚纲的分类是以触手的数量及结构来定界的。已灭绝及最原始的箭石下纲相信是有10只触手。较现代的物种其中一对触手可能已经进化或退化了。十腕总目的第四对手臂进化成为有吸盘的长触手。八腕总目的第二对手臂有不同的改变，如幽灵蛸目的感应丝状物或八腕目的已完全退化。
英语百科
Coleoidea 蛸亚纲
（重定向自Coleoid）
Subclass Coleoidea, or Dibranchiata, is the grouping of cephalopods containing all the various taxa popularly thought of as "soft-bodied" or "shell-less," i.e., octopus, squid and cuttlefish. Unlike its extant sister group Nautiloidea, whose members have a rigid outer shell for protection, the coleoids have at most an internal cuttlebone, gladius, or shell that is used for buoyancy or support. Some species have lost their cuttlebone altogether, while in some it has been replaced by a chitinous support structure.
- positive transmutation的意思
- positive traumataxis的意思
- positive traumatropism的意思
- positive trigger的意思
- positive triggering pulse的意思
- positive trophotropism的意思
- positive tropism的意思
- positive tube的意思
- positive T wave的意思
- positive twist的意思
- positive type的意思
- positive type function的意思
- positive type mold的意思
- positive type mould的意思
- positive type supercharger的意思
- positive uncertainty的意思
- positive uni axial crystal的意思
- positive uniaxial crystal的意思
- positive unloading stripper的意思
- positive upward path的意思
- positive valence的意思
- positive valency的意思
- positive value的意思
- positive valve的意思
- positive variance的意思