Reference for Taanit 47:1
יומא חד שמעיה דקא גריס אמר שמואל השולה דג מן הים בשבת כיון שיבש בו כסלע חייב א"ל ולימא מר ובין סנפיריו אמר ליה ולא סבר לה מר דההיא רבי יוסי בן רבי אבין אמרה אמר ליה אנא ניהו
One day he heard him reciting a tradition that Samuel had said: He that takes out of the sea a fish on the Sabbath, as soon as there is on it a dry spot as large as a sela', he has committed a breach of the Sabbath laws.<span class="x" onmousemove="('comment',' Cf. Shab. 107b. He desecrates the Sabbath by killing which is one of the thirty-nine primary types of work forbidden on the Sabbath (cf. Shab. 73a) .');"><sup>1</sup></span> Thereupon R'Jose B'Abin asked him: Why does not the Master add, 'and between the fins'? He replied : Are you not aware that R'Jose B'Abin had [already] stated this? [The former] retorted: I am R'Jose B'Abin.