The phrase "more coldfish" implies a lack of warmth, emotion, or friendliness. Antonyms for this phrase include words like warm, friendly, approachable, kind, and sympathetic. These words indicate a welcoming and open demeanor, indicating a willingness to engage with others on an emotional level. These antonyms can be used to describe people who are friendly, empathetic, or who make others feel comfortable and at ease. By using antonyms for "more coldfish," we can describe people who are more desirable to be around, and who are more likely to form meaningful social connections with others.