can you please describe this creature?
It had straight ,conical teeth and had a sail on its back.
Ichthyovenator
In 2016, Gregory S. Paul estimated "Ichthyovenator" to have been approximately long and to have weighed . The same year, Rubén Molina-Pérez and Asier Larramendi gave an estimate of in length, tall at the hips, and in weight.

"Ichthyovenator"s teeth were conical, straight, and bore no serrations. The front edges of the maxillary and dentary teeth were evident on the base of the tooth crown. The front articulating surfaces of "Ichthyovenator"s rear cervical and front dorsal vertebrae were one-and-a-half times wider than they were high and wider than the length of their centra. They also bore robust front tubercles (processes for skeletal muscle attachment) and lacked interzygapophyseal laminae (bony plates), which resulted in their spinopre- and spinopostzygapophyseal fossae (depressions) having open undersides. The first dorsal vertebra had extensive transverse processes (wing-like projections that articulate with the ribs), as well as deep excavations at the front and back of its base
what is an ichthyovenator? A genus of spinosaurid dinosaur. who discovered it? UNANSWERABLE where was it discovered? In  the Grès supérieurs Formation of the Savannakhet Basin.
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Ichthyovenator [SEP] Description
In 2016, Gregory S. Paul estimated "Ichthyovenator" to have been approximately long and to have weighed . The same year, Rubén Molina-Pérez and Asier Larramendi gave an estimate of in length, tall at the hips, and in weight. "Ichthyovenator"s teeth were conical, straight, and bore no serrations. The front edges of the maxillary and dentary teeth were evident on the base of the tooth crown. The front articulating surfaces of "Ichthyovenator"s rear cervical and front dorsal vertebrae were one-and-a-half times wider than they were high and wider than the length of their centra. They also bore robust front tubercles (processes for skeletal muscle attachment) and lacked interzygapophyseal laminae (bony plates), which resulted in their spinopre- and spinopostzygapophyseal fossae (depressions) having open undersides.