The bodies of 33 refugees were taken to hospitals in the western port city, a health official there said, adding that 35 wounded had also been admitted.
It remained unclear who had carried out the attack or whether it came from a military vessel or an attack helicopter.
The Saudi-led coalition, which is fighting alongside Yemen's internationally recognised government, has accused the Shiite Houthi rebels of using Hodeida as a smuggling route for weapons.
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But members of the House State Affairs Committee also told witnesses and other lawmakers that Senate Bill 4 by state Sen. Bevin was among those who testified in support of the legislation during the committee meeting early Friday morning.
In Geneva, the spokesman for the International Organization for Migration, Joel Millman, told reporters that the death toll could rise beyond 31. 32 people, including 10 civilians, have been killed.
He says when the helicopter gunship opened fire, panic erupted among the refugees.
The refugees, who included children, were hit in waters 30 miles off the southern coastline of Shia rebel-held Hodeida province, according to a Yemeni trafficker who survived the attack.
There was no comment from the coalition.
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In a friend of the court brief filed in Hawaii federal court, they implored the court to suspend Trump's new immigration order. Watson said he wasn't convinced the order itself has religious connotations.
Al-Massirah Yemeni television reported that the Saudi-led warplanes targeted a boat carrying dozens of Somali immigrants off al-Hudaydah in Yemen.
The UNHCR said in a tweet that it was "appalled by this tragic incident, the latest in which civilians continue to disproportionately bear the brunt of conflict in Yemen".
Mohammed Abdiker, emergencies director at the International Organization for Migration in Geneva, said the attack was "totally unacceptable" and questioned why there had been no effort to check who was on board the boat before it was sacked upon.
Despite the crisis, Yemen continues to be an important transit point for African migrants.
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Lawyers in Washington state had asked Judge Robart to extend his decision on the first ban to cover the second. The court in Seattle's heard an application from States who want the order suspended.
"Coalition planes launched dozens of strikes on coastal areas of Hudaida, in support of advances by troops on the ground", a local source told the site, which is known to be opposed to the Houthi rebels.