Deals of the day-Mergers and acquisitions

April 8 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1330 GMT on Wednesday:

American Ocean Minerals will merge with Odyssey Marine Exploration <OMEX.O> in an all-stock deal valuing the combined company at about $1 billion, the firms said, as they seek to create a U.S.-controlled deep-sea critical minerals platform.

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Canada's Blackline Safety <BLN.TO> has agreed to be taken private by U.S. private equity firm Francisco Partners in a deal valued at up to $850 million, including a contingent payout tied to future revenue growth, the safety technology company said .

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U.S. private equity firm Advent International said it would not make an offer for Senior Plc <SNR.L>, after the British aerospace supplier agreed to a 1.4 billion pound ($1.88 billion) takeover proposal from a consortium comprising Tinicum and Blackstone <BX.N> .

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Spain's Telefónica said on Tuesday it will sell its Mexican businesses to a U.S.-led consortium in a deal valuing the unit at $450 million, as the telecom operator looks to exit its non-core businesses and sharpen its focuson Europe.

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Billionaire investor Bill Ackman's Pershing Square proposed a takeover of Universal Music Group on Tuesday in a $64 billion deal, the latest twist in his nearly five-year quest for the music label giant.

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Marsh McLennan Agency (MMA) has acquired Seitz Insurance Agency, a Sidney, Montana-based provider of commercial and personal lines insurance solutions specializing in the agriculture, crop and energy industries.

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