SeaWorld Entertainment CEO Joel Manby. Image via Wikimedia Commons

SeaWorld Entertainment Inc. announced Tuesday that its CEO stepped down in what the theme park company termed a “leadership transition plan.”

Chief Parks Operations Officer John T. Reilly will serve as interim CEO following the departure of Joel Manby, according to the Orlando, Florida-based company. The board plans to launch a national search to find a permanent successor.

Manby was hired in 2015 to help turn SeaWorld around following a firestorm of criticism over its killer whales that resulted dip in attendance. On Tuesday, SeaWorld shares fell 5.21 percent in value, diving to $14.92.

Meanwhile, an orca expert with the Animal Welfare Institute says she regrets Manby’s departure.

Naomi Rose, AWI marine mammal scientist, said in a statement:

“During his tenure as CEO, Mr. Manby ended the breeding of the company’s captive orcas and toned down the theatrical elements of the circus-like orca and dolphin shows.

“While he needed to do much more, including set a goal of retiring the orcas to seaside sanctuaries, Mr. Manby clearly understood that the world is increasingly less accepting of keeping these large, wide-ranging, intelligent beings in concrete tanks.

“We strongly urge his replacement, John Reilly, to maintain the forward progress that Mr. Manby began and not reverse course by sending its animals to theme parks abroad.”

Reilly has served as park president of SeaWorld San Diego and Busch Gardens Williamsburg. He has been with the company for more than three decades.

“The board agreed that this transition plan is the right approach to advance the company’s progress and create value for all our important stakeholders,” said Donald Robinson, lead independent board director.

Reilly serves on the board of trustees of the Hubbs-SeaWorld Research Institute and holds a bachelor’s degree from The College of William & Mary.

Others noted SeaWorld’s recent economic performance and falling attendance.

— City News Service contributed to this report.