原文视听

They're laid so close to the anemone they will be safe.
产卵的地方很靠近海葵 所以安全无虞
And for the next seven days they'll receive constant care...
未来七天会经常得到照顾
..much of which is provided by the male.
大多是由公鱼负责照管
His seemingly obsessive concern for the eggs is for good reason.
它对鱼卵看似过度担忧 其实有充分的理由
His position in the anemone is far from secure.
它在海葵里的地位 一点也不稳固
The female watches his every move,
母鱼留意它的一举一动
she's in charge here and if his efforts don't match up
这里是母鱼当家作主
to her standards, she'll get rid of him.
要是它认为公鱼的努力不够 就把它一脚踢开
In line to take over are a host of immature clown fish...
一大群不成熟的小丑鱼 排队等着取而代之
..each waiting to move up the hierarchy.
每条鱼都等着向上晋升
For the male the best way to stay in the female's favour
公鱼要继续讨母鱼欢心 最好的办法
is by lavishing care on the eggs.
就是用尽心思照顾鱼卵
So he focuses all his efforts on keeping them clean and healthy.
它用全副心力 保持鱼卵的洁净和健康
The eggs grow rapidly and soon their tiny beating hearts are visible.
鱼卵迅速长大 很快就能看见小小的心脏
It seems he's done a good job.
看来公鱼把鱼卵照顾得很好

重点解释

His seemingly obsessive concern for the eggs is for good reason.它对鱼卵看似过度担忧其实有充分的理由

concern for:对 ... 的关心； 忧虑

His concern for the poor is only a pose.

他对穷人的关心只不过是做做样子罢了。

The teacher showed particular concern for the disabled child.

老师特别关心那个残疾儿童。

she's in charge here and if his efforts don't match to her standards, she'll get rid of him.这里是母鱼当家作主，要是它认为公鱼的努力不够，就把它一脚踢开

in charge:负责；主管

I am in charge of financial affairs.

我职掌财务。

I gather that he is the one in charge.

我猜想他是负责的人。

get rid of:摆脱； 除去

Let's get rid of this moldy old furniture.

咱们把这件老掉牙的旧家具扔掉吧。

The fat boy went on a diet to get rid of his excess weight.

这个胖男孩节制饮食以减轻过量的体重。

So he focuses all his efforts on keeping them clean and healthy.它用全副心力保持鱼卵的洁净和健康

focus on集中在

You should focus your attention on your work.

你应该把注意力放到工作上。