The giant mottled eel Anguilla marmorata Quoy & Gaimard is an important aquaculture candidate in eel farming industry. The high economic value of the species leads to intensive cultivation affecting its welfare under farm condition. Since colour environment affects the welfare of confined fishes, basic information on colour vision is necessary. By means of a behavioural experiment of A. marmorata elvers in the laboratory, we determined colour vision under natural daylight. The elvers were subjected to classical conditioning to associate a reward feed with a blue or a green stimulus placed amid seven shades of grey. The elvers learned this visual task after 30 or 36 trials and thus the ability of colour discrimination was confirmed. Since the elvers have the retinal tapetum, it may be suggested that colour vision in dim light enables crepuscular feeding by the A. marmorata elvers, clearly an advantage in aquaculture.

该鲈鳗安圭拉marmorata Quoy＆Gaimard是鳗鱼养殖业的重要的水产养殖候选人。该物种的高经济价值导致精耕细作影响了农场条件下的福利。由于颜色环境会影响鱼类的福利，因此需要有关色觉的基本信息。通过对番茄的A.mormorata进行的行为实验在实验室中，我们确定了自然光下的色觉。对幼崽进行经典调节，使奖励饲料与放置在七种灰色阴影中的蓝色或绿色刺激物相关联。在经过30或36次试验后，长老们学会了这一视觉任务，因此可以确认颜色辨别能力。由于鳗线具有视网膜绒毡层，它可以被认为，在昏暗的灯光颜色视觉使由黄昏馈送A. marmorata鳗线，显然在水产养殖中的优点。