Mishnah Uktzin 3:9: The [forbidden] fat of a pure [i.e. kosher] beast cannot be rendered impure with the impurity of foods; therefore, it requires being primed [for impurity, by becoming damp]. The fat of an impure [i.e. non-kosher] beast can be rendered impure with the impurity of carrion; therefore it does not require being primed [for impurity]. Impure fish and impure locusts [before they can be rendered impure] require intentional thought [designating them for human consumption] in villages.

חֵלֶב בְּהֵמָה טְהוֹרָה, אֵינוֹ מִטַּמֵּא טֻמְאַת נְבֵלוֹת, לְפִיכָךְ הוּא צָרִיךְ הֶכְשֵׁר. חֵלֶב בְּהֵמָה טְמֵאָה, מִטַּמֵּא טֻמְאַת נְבֵלוֹת, לְפִיכָךְ אֵינוֹ צָרִיךְ הֶכְשֵׁר. דָּגִים טְמֵאִים וַחֲגָבִים טְמֵאִים, צְרִיכִין מַחֲשָׁבָה בַּכְּפָרִים:

Mishnah Uktzin 3:10: Regarding a beehive, Rabbi Eliezer says: it is thereby like land, and one can write a Pruzbul [a court-issued exemption from the Sabbatical year cancellation of a personal loan] on it [i.e. it counts as land for the purposes of the requirement that the borrower own land in order for a Pruzbul to be written], and it cannot be rendered impure in its place [i.e. as long as it is not moved], and one who removes [honey] from it on Shabbat is liable [to bring] a sin-offering. But the Sages say: it is not like land, and one many not write a Pruzbul on it, and it can be rendered impure in its place, and one who removes [honey] from it on Shabbat is exempt [from bringing a sin-offering].

כַּוֶּרֶת דְּבוֹרִים, רַבִּי אֱלִיעֶזֶר אוֹמֵר, הֲרֵי הִיא כְקַרְקַע, וְכוֹתְבִין עָלֶיהָ פְּרוֹזְבּוּל, וְאֵינָהּ מְקַבֶּלֶת טֻמְאָה בִמְקוֹמָהּ, וְהָרוֹדֶה מִמֶּנָּה בְּשַׁבָּת חַיָּב חַטָּאת. וַחֲכָמִים אוֹמְרִים, אֵינָהּ כְּקַרְקַע, וְאֵין כּוֹתְבִים עָלֶיהָ פְּרוֹזְבּוּל, וּמְקַבֶּלֶת טֻמְאָה בִמְקוֹמָהּ, וְהָרוֹדֶה מִמֶּנָּה בְּשַׁבָּת פָּטוּר: