Although perhaps not the most typical individual in some of the pics, this looks like lucipinnis to me. How many are there? The large random body spots/blotches give it away as this species - it looks relatively small though.
Lou: Every young man's fantasy is to have a three-way. Jacob: Yeah not with another fu**!ng guy! Lou: It's still a three-way!
they are 5 (+/- 2")... shy at first but after 6 month they come out for food and just for swim at some moment...
active during the day and seem at night too...