Update: Carnival Corp. & plc ceo Arnold Donald accepted the challenge and, in turn, challenged CNBC's Simon Hobbs, BBC's Katty Kay, CBS's Peter Greenberg and CNN's Richard Quest.

The #IceBucketChallenge, to raise awareness and funds for amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig’s Disease, had already gone viral but the Carnival family has considerably upped the ante.

AmaWaterways' 2015 'Europe, Russia, Asia & Africa' brochure introduces three new ships, a new destination and fresh theme cruises, as well as the return of the line's wine and Christmas markets sailings.

Carnival Cruise Lines has raised more than $5m toward its $8m goal for St. Jude Children’s Research Hospital.

MSC Cruises has donated €3m to the United Nations Children’s Fund UNICEF, during a handover ceremony at MSC Cruises’ Geneva headquarters.

Princess Cruises presented a check for $832,000 to the American Heart Association, the result of the line’s fundraising cruise in February to support heart health. The educational themed sailing was part of the company’s 'Cruising for a Cause' program.

Carnival Foundation, in partnership with Carnival Corp. & plc, is providing a $2.5m gift over five years to support The Nature Conservancy's global marine protection priorities.

Last week, as Celebrity Cruises' Celebrity Equinox completed its scheduled drydock in Cadiz, Spain, it joined Royal Caribbean International's Allure of the Seas and Explorer of the Seas in a program that tracks ocean circulation dynamics and measures atmospheric and oceanographic conditions, on repeated journeys.

The Cruise Industry Charitable Foundation hosted an event on board Carnival Breeze at PortMiami to support the work of the Barbara Bush Foundation for Family Literacy. The national nonprofit, which provides young children and their low-literate parents the opportunity to learn together, is marking its 25th anniversary this year with a series of special events.

Oceania Cruises said proceeds from its namesake fabric collection created by Kravet Inc. for its ships and available to the interior design trade will be donated to St. Jude Children's Research Hospital.

Not surprisingly Costa Concordia dominated Cruise Shipping Miami’s State of the Industry panel but the discussion—about safety, environmental practices and corporate citizenship—seemed targeted at a more general audience than those in the room.

Cruise lines were clearly eager to present a responsible and capable united front to the public and regulators at this time, more than ever before.

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