3 harsh and threatening in manner or appearance the fierce faces of the players on the opposing hockey team Synonyms austere, dour, grim, flinty, forbidding, gruff, intimidating, lowering (also louring), rough, rugged, severe, stark, steely, stern, ungentleRelated Words bleak, cold, hostile, inhospitable, inimical, unfriendly, unsympathetic; adamant ...
Puffer fish from all other sources potentially contain deadly toxins and therefore are not considered safe. The liver, gonads (ovaries and testes), intestines, and skin of some puffer fish contain the toxins tetrodotoxin and/or saxitoxin.
Forcing this fish to repeatedly puff may result in the death of this fish. The Blue/White Arothron Puffer would exhibit this characteristic as only a last resort, because it would lose its total mobility. Recommended Tank size: A 125 gallon or larger, fish-only aquarium with a good protein skimmer is suitable.