By ARABELLA SERRATA
Staff Writer
In a compelling interview with Tony Reisinger, Rio Grande Valley (RGV) Marine Biologist, Captain Robert “Bob” Sanchez shared insights into marine life, shark encounters and environmental challenges facing the region. The conversation, rich with anecdotes and expertise, ranged from shark behavior to the impacts of environmental changes on local species.
The discussion inevitably turned to recent shark incidents on the island. When asked about the type of shark involved in a recent attack, Captain Sanchez identified it as likely being a bull shark. “Many sharks have a pointed mouth, but the bull shark has a rounded one,” Sanchez explained. Bull sharks, which can grow up to nine feet, are known for their aggressive behavior. Sanchez emphasized, however, that these sharks do not act out of malice.
He attributed the recent attack to the challenges sharks face in finding food during storms like Beryl, which can increase their agitation. Tabatha Sullivant, the attack victim, had mistaken the shark for a “big fish” and kicked it. Sanchez and Reisinger suggested implementing a shark watch program, possibly using drones, to enhance beach safety.
Beyond the headline-grabbing shark story, the duo delved into the broader marine ecosystem of the valley. They discussed the diversity of marine life, noting that the Texas coast is home to at least 57 species of ground sharks. They also highlighted the three commercial shrimp species in the area—pink, white and brown shrimp. However, the local shrimping industry has been in decline, with the number of shrimping nodes dropping from nearly 500 to about 108 due to the 2021 freeze and falling shrimp prices. Of the 30 shrimp boats in Port Isabel, only six plan to finish the current season.
Sanchez also addressed the issue of invasive species, particularly tiger shrimp, which originated in Asia and were accidentally released from South Carolina in the 1970s. Though they are occasionally caught today, their population has not significantly expanded. The conversation touched on various historical releases of non-native species and their consequences.
The interview revealed troubling news about the flounder population in the Gulf of Mexico. Warming waters have negatively impacted flounder, which prefer cooler environments. Texas Parks and Wildlife has been working to boost the Southern Flounder population but faces challenges due to the species’ competition for sea floor space. New regulations have been introduced to manage flounder fishing, including a complete closure of the fishery from Nov. 1 to Dec. 14 and a bag limit reduction to zero.
Sanchez also shared some delightful trivia, noting that the specific saltwater environment of Laguna Madre gives local oysters their unique flavor through certain amino acids. He mentioned there are about ten oyster farms in the area, each adapted to their specific harvesting locations.
In a lighter moment, Reisinger announced that Captain Bob’s in Brownsville will host its first “Ladies Night,” offering free stuffed avocados to attendees from 5-8 p.m. Captain Sanchez also revealed his plans for retirement, expressing a desire to continue learning and attending lectures on various topics, including astronomy.
Throughout the interview, Sanchez and Reisinger reminisced about their shared experiences and the vital role of wildlife in daily life. The conversation was a testament to Sanchez’s passion for the natural world and his lifelong dedication to learning. “I’ve learned so much in my 42 years, just here in the Valley,” Sanchez reflected, encapsulating the spirit of the interview.
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