Exactly 10 years after the death of Steve Irwin, the Crocodile Hunter, his daughter has paid a simple tribute to her "hero."

Bindi posted a photo on Instagram on Sunday, which was Father's Day in Australia. The image shows Steve proudly holding her as a baby with one arm.

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"You'll be my hero for my entire existence. I love you more than words can describe," Bindi wrote.

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Steve's wife Terri also took to Twitter to reflect on what would have been an emotional day for the whole family.

"Happy Father's Day. Hug your dad," Terri wrote on Sunday, which was accompanied with a photo of Steve and his children, Bindi and Robert.

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The television star and wildlife expert died from a stingray attack in 2006 during the filming a documentary, Ocean's Deadliest, in Australia. Bindi was only eight at the time, while her brother Robert was nearly three years old.

Bindi, now 18, had reflected on the loss of her father on monumental days in an interview with Entertainment Tonightin July, just before her birthday.

"I can feel that he's not here anymore on most of the days that are really big for our family," Bindi explained.

Only last Friday, a handwritten note written by Steve to his parents before his death was released by his father, Bob Day. The note was a thank you to his parents.

"Probably one of the most unfortunate things in a 'Bloke's Life' [sic] is that it takes over 30 years to realise how essential you have been to build my character, my ethics and, most importantly, my HAPPINESS," Steve wrote.

"At 32, I am finally starting to figure it out. In good times and in bad, you were there. Your strength and endurance to raise me will not go unrewarded. My love for you is my strength!

"For the rest of my life I will reflect on the unbelievably GREAT times we’ve shared and will continue to share. You're my best friends!"