The feeding behaviour of deep-sea animals is largely understudied despite being of relevance to assess changes in ecosystems functioning in the face of anthropogenic impacts and climate regime shifts. Here, time-lapse videography in dark, cold-water, flow-through laboratory settings was used to study the behaviours of a gastropod (Buccinum scalariforme) and three sea stars (Ceramaster granularis, Hippasteria phrygiana, Henricia lisa) from the bathyal Northwest Atlantic, to build knowledge on their foraging strategies (i.e. food search, assessment and handling). In all species tested, the presence/absence of a palatable food source modulated the speed and directionality of movements. Approach paths were erratic in the absence of palatable food and targeted in its presence: B. scalariforme, C. granularis and H. phrygiana, moved in straight line to the food, while H. lisa moved either in straight line or counterclockwise loop. The four species traveled at mean speeds of 2.9, 0.2, 0.7, and 0.6 cm min⁻¹, respectively. At the finer scale, unprecedented pulses in displacement speed were detected, varying in amplitude and frequency depending on the food item. The results also support more generalist diets and broader scavenging habits in deep-sea sea gastropods and sea stars than assumed from previous studies and knowledge of shallower-water counterparts. Depth-related food limitation may drive greater flexibility in foraging strategies and acceptable food items.

尽管深海动物的摄食行为与评估面临人为影响和气候制度变化的生态系统的变化有关，但在很大程度上尚未得到充分研究。在这里，在黑暗、冷水、流通实验室环境中的延时摄影被用来研究腹足动物（Buccinum scalariforme）和三颗海星（ Ceramasterparticleis、 Hippasteria phrygiana、 Henricia lisa）的行为) 来自西北大西洋的深海，以建立有关其觅食策略（即食物搜索、评估和处理）的知识。在所有测试的物种中，可口食物源的存在/不存在调节了运动的速度和方向性。进场路径是在没有可口食品不稳定和有针对性的在它的存在：B. scalariforme，C. granularis和H. phrygiana，在直线到食品移动，而H.丽萨在直线或逆时针循环被移动。四个物种以 2.9、0.2、0.7 和 0.6 cm min ^-1的平均速度行进， 分别。在更精细的尺度上，检测到前所未有的位移速度脉冲，其幅度和频率因食物而异。结果还支持深海腹足类动物和海星的普遍饮食和更广泛的清除习惯，而不是先前的研究和浅水对应物的知识所假设的。与深度相关的食物限制可能会在觅食策略和可接受的食物项目方面带来更大的灵活性。