If Jones hadn't been sent off for a foul, they'd've won easily.
Wiktionary
They-d-ve Sentence Examples
Probably they dive when the surface becomes ruffled.
Their food consists of marine vegetation, to obtain which they dive beneath the water, where they are able to remain, without coming to the surface to breathe, for a very considerable time.
They tend to stand back and access a situation before they dive in.
