Boy finds Water-Dinosaur Baby (Nessy-like) on Island or Coast – abducted by scientists

I remember this (Japanese?) animated movie that I watched about 15 years ago on TV…

It is about a boy who “finds” a swimming baby dinosaur (don’t know exactly what the species is called – it’s the Nessy type, I think!) – maybe it’s an egg first and hatches later.
The dinosaur’s mother has been stranded on the beach of an (tropical?) island or some coast and its HUUUGE carcass/skeleton is discovered by the public!

Later on, the baby dinosaur is abducted by some scientists, but the boy is able to rescue it and punches one of them in the face (or something along those lines).

Sadly, that’s all I can remember. Can you help me? 🙁

2 thoughts on “Boy finds Water-Dinosaur Baby (Nessy-like) on Island or Coast – abducted by scientists

  1. I just found it! The English title is “Coo of the Far Seas” (1993).
    I should have searched for “Plesiosaur baby” earlier…

    Now, if you’ll excuse me, I’ll dive into my childhood memories 🙂

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