This post is possible due to the generosity of long-time Art of Diving supporter Chris so a big "Thank You" to him.
Sensacional de Luchas (Sensational Fighting) was a series of 96-page, pocket-sized comics starring real-life Luchadores Enmascarados (Masked Wrestlers). The publishers produced a whole range of Sensacional de... titles including ...Policías (Police), ...Barrio (Neighborhoods) , ...Traileros (Truck Drivers) ...Terror (Horror) and ...Sirvientas (Maids). I'm gutted that haven't been able to find any examples of that last one!
Sensacional de Luchas #219 was published in January 1990 and featured the story Fishman en Busca del Galeón Perdido (Fishman in Search of the Lost Galleon).
The cover painting, signed "Garr", is by Rafael Gallur Rivas. He had previously been an interior artist but switched to doing covers. Although primarily working in Mexico he's credited with assisting Pablo Marcus on issue one of DC's Star Trek: The Modala Imperative.
Unfortunately I can't decipher the signature of the artist that drew the actual strip. If anyone has any ideas please let me know.
Fishman was the ring name of José Ángel Nájera Sánchez (1951-2017). He made his debut in 1969 and retired in 2000 after losing a fight and being unmasked. His impromptu ring debut, which came about when another wrestler failed to show up, was under the name Goliath Reyes. He lost the fight and carried on training before eventually returning to the ring as Titán. A comment that the eyes of his mask looked like those of a fish prompted him to create the identity of Fishman. His mask, originally in gold and black, was based on the shape of a Manta Ray wrapped around his face. He changed his outfit to green and yellow because the original colours were too close to those of one of the top wrestlers of the time. This led to him being nicknamed El Veneno Verde (The Green Poison). His brutal style led to him being cast as a Rudo - a bad guy.
He had a long career with various wrestling organisations and was sometimes involved in long-running storylines with other wrestlers. As was the custom, his real name only became known after his final defeat and unmasking. His first wife was a Luchadora who worked under the name Lola González. Three of his sons also became wrestlers: Black Fish (originally Fishman Jr.), El Hijo del Fishman (Son of Fishman) and El Único de Ciudad Juárez. He died after a heart attack in April 2017.