I'm a Portuguese speaker and this is very clear when I speak Spanish, and though they are different languages, they are similar enough that I think I can translate this and get fairly close to the intended meaning. This is a meaning-based translation, not a word-for-word one.
A todo los colegas de buceo: esta pareja de buzos se llaman xxx,de Cedar Rapids, Iowa, hoy lo llevè a bucear en el parque marino de Cozumel
To all diving colleagues: today I took this pair of divers named xxx, from Cedar Rapids, Iowa, to dive in the Cozumel marine park
y se han portado sin respetar las reglas de protecciòn del arrecife, con la escusa de arponear los pezes leones
and they took along, in violation of the reef protection regulations, with the excuse of spearfishing lionfish
se pegavan al fondo marino y se metian en huecos estrictos descuidosamente, tocaron una tortuga,
they stayed in contact with the reef, forced themselves carelessly through narrow openings, grabbed a turtle
despues de tantas racomendaciones le quitè los arpones cuando tratavan de matar un pez leon metendo el arpon a dentro de una esponja!
after having warned them many times, I took away their spears when they stuck the spear into a sponge while they were trying to kill a lionfish!
despues por enojo me han signalado una groceria
after that, they angrily gave me the finger (he actually says "they made a vulgar hand signal")
y al subir al barco me han tirado mi equipo al mar!
and when we got back on the boat, they threw my gear into the sea!
favor de compartir este cominucado a todos los colegas y centro de buceo que son de la zona y mas,
please share this message with all colleagues and dive centers in the immediate area and beyond
con el objectivo de vietar (NO PERMITIR) el buceo a estas personas sin respecto de la vida submarina y de los operadores que hacen muchos sacrificios para la diverciòn de los buzos.
in order to block (NOT ALLOW) diving by these people who do not respect marine life nor the operators who work hard to to provide a good experience for divers
gracias a todos los colegas por l'atenciòn
thanks to all of my colleagues for your attention