1.
"They have two dorsal fins and often are Brightly coloured. Most species are 2-3 in. (5-7 cm) long, But some grow to 9 in. (23 cm)."
具两背鳍,体长多为2～3吋(5～7公分),但有些可长至9吋(23公分)。
2.
an anal [dorsal, pectoral, ventral] fin
尾 [背,胸,腹] 鳍
3.
Association between type Ⅰ and type Ⅱvenom glandular cells of in dorsal fin spine of Stonefish (Inimicus japonicus) was studied by light microscopy and electro microscopy.
日本鬼背鳍棘毒腺中有两种类型毒腺细胞——Ⅰ型细胞和Ⅱ型细胞。
4.
fish having greatly elongated front rays on dorsal and anal fins.
背鳍和尾鳍上有很细长的触须的鱼。
5.
"It has one dorsal and one anal fin, Both long and Both connected to the rounded tail. "
背鳍和臀鳍各一,形长,均与尾鳍基部相连,尾鳍圆形
6.
Experimental and Numerical Researches on Undulatory Dorsal/Median Fin Propulsion Modes;
背鳍/背臀鳍波动推进机理实验研究及仿真
7.
You can see that upper and lower fin" seems" like a part of the body.
七彩的背鳍和腹鳍看上去是身体的一部分。
8.
A primitive, bony freshwater fish(Amia calva)of central and eastern North America, with a long, spineless dorsal fin.
弓鳍鱼北美洲中部和东部的一种原始、多骨的淡水鱼（弓鳍鱼弓鳍鱼属），具有长的无脊的背鳍
9.
the dorsal fin is the vertical fin on the back of a fish and certain marine mammals.
背鳍就是在鱼或者某些海洋哺乳动物背上的垂直鳍。
10.
dogfishes having a spine in each dorsal fin.
背鳍上各有一刺的角鲨鱼。
11.
small smooth-skinned sharks lacking spines on dorsal fins.
背鳍上无刺表皮光滑的小型鲨鱼。
12.
black-and-white drumfish with an erect elongated dorsal fin.
长有细长直立背鳍身体花白的石首鱼。
13.
The upper and lower fins don't cover the tail or leave a big gap before the tail.
背鳍和腹鳍不包含鱼的尾巴，或者说，和尾巴离开一个很大的空隙。
14.
voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins.
任一种蛇形的淡水鱼，体表光滑无鳞，有连续的垂直背鳍，缺少腹鳍。
15.
any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs.
中生代的几种水生爬行动物，身体象海豚，有背鳍和尾鳍，四肢形如浆。
16.
They are quite an accomplishment in betta form.
巨大、下伸展的尾鳍，完美的背鳍及对称的臀鳍，半月斗鱼绝对是斗鱼型态上的一大成就。
17.
small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines.
北部海洋浅水中细长的小鱼；完全由刺组成背鳍。
18.
large pelagic game fish having an elongated upper jaw and long sail-like dorsal fin.
大型远洋食用鱼，有细长的上颌和帆状的长背鳍。